diff --git a/configs/qcloud-clb7-product.yml b/configs/qcloud-clb7-product.yml
new file mode 100644
index 0000000..91cc2fe
--- /dev/null
+++ b/configs/qcloud-clb7-product.yml
@@ -0,0 +1,17 @@
+credential:
+  access_key: "access_key"
+  secret_key: "secret_key"
+  region: "region"
+
+rate_limit: 15                  #云监控拉数据接口最大限制, 20/秒, 1200/分钟, https://cloud.tencent.com/document/product/248/31014
+
+products:
+  - namespace: QCE/LOADBALANCE  #指标详情: https://cloud.tencent.com/document/product/248/45045
+    all_metrics: true
+    all_instances: true
+    #only_include_metrics: []
+    #only_include_instances: [lb-xxxxxxxx]
+    #extra_labels: [InstanceName]
+    #statistics_types: [last]
+    #period_seconds: 60
+    #metric_name_type: 2
\ No newline at end of file
diff --git a/pkg/collector/collector.go b/pkg/collector/collector.go
index 21586c7..f35bcad 100644
--- a/pkg/collector/collector.go
+++ b/pkg/collector/collector.go
@@ -36,6 +36,7 @@ var (
 	collectorState = make(map[string]int)
 )
 
+// 总指标采集器, 包含多个产品的采集器
 type TcMonitorCollector struct {
 	Collectors map[string]*TcProductCollector
 	config     *config.TencentConfig
diff --git a/pkg/collector/handler.go b/pkg/collector/handler.go
index 852f645..99b6737 100644
--- a/pkg/collector/handler.go
+++ b/pkg/collector/handler.go
@@ -11,12 +11,19 @@ var (
 	handlerFactoryMap = make(map[string]func(*TcProductCollector, log.Logger) (productHandler, error))
 )
 
+// 每个产品的指标处理逻辑
 type productHandler interface {
+	// 获取云监控指标namespace
 	GetNamespace() string
+	// 对指标元数据做检验和补充
+	CheckMetricMeta(meta *metric.TcmMeta) bool
+	// 是否包含该指标, ture=包含, false=不包含
 	IsIncludeMetric(m *metric.TcmMetric) bool
+	// 获取该指标下符合条件的所有实例, 并生成所有的series
 	GetSeries(tcmMetric *metric.TcmMetric) (series []*metric.TcmSeries, err error)
 }
 
+// 将对应的产品handler注册到Factory中
 func registerHandler(namespace string, isDefaultEnabled bool, factory func(*TcProductCollector, log.Logger) (productHandler, error)) {
 	handlerFactoryMap[namespace] = factory
 }
@@ -36,7 +43,7 @@ func (h *baseProductHandler) GetSeries(m *metric.TcmMetric) (slist []*metric.Tcm
 				continue
 			}
 			ql := map[string]string{
-				h.monitorQueryKey: ins.GetInstanceId(),
+				h.monitorQueryKey: ins.GetMonitorQueryKey(),
 			}
 			s, err := metric.NewTcmSeries(m, ql, ins)
 			if err != nil {
@@ -52,7 +59,7 @@ func (h *baseProductHandler) GetSeries(m *metric.TcmMetric) (slist []*metric.Tcm
 		}
 		for _, ins := range insList {
 			ql := map[string]string{
-				h.monitorQueryKey: ins.GetInstanceId(),
+				h.monitorQueryKey: ins.GetMonitorQueryKey(),
 			}
 			s, err := metric.NewTcmSeries(m, ql, ins)
 			if err != nil {
@@ -71,13 +78,13 @@ func (h *baseProductHandler) GetSeries(m *metric.TcmMetric) (slist []*metric.Tcm
 			}
 			ins, err := h.collector.InstanceRepo.Get(v)
 			if err != nil {
-				level.Error(h.logger).Log("msg", "Instance not found", "id", v)
+				level.Error(h.logger).Log("msg", "Instance not found", "err", err, "id", v)
 				continue
 			}
 
 			s, err := metric.NewTcmSeries(m, ql, ins)
 			if err != nil {
-				level.Error(h.logger).Log("msg", "Create metric series fail", "metric", m.Meta.MetricName, "instacne", ins.GetInstanceId())
+				level.Error(h.logger).Log("msg", "Create metric series fail", "err", err, "metric", m.Meta.MetricName, "instacne", ins.GetInstanceId())
 				continue
 			}
 			slist = append(slist, s)
diff --git a/pkg/collector/handler_cdb.go b/pkg/collector/handler_cdb.go
index 7711280..554a756 100644
--- a/pkg/collector/handler_cdb.go
+++ b/pkg/collector/handler_cdb.go
@@ -18,6 +18,10 @@ type cdbHandler struct {
 	baseProductHandler
 }
 
+func (h *cdbHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *cdbHandler) GetNamespace() string {
 	return CdbNamespace
 }
diff --git a/pkg/collector/handler_cdn.go b/pkg/collector/handler_cdn.go
index 390aff2..a7c074d 100644
--- a/pkg/collector/handler_cdn.go
+++ b/pkg/collector/handler_cdn.go
@@ -20,6 +20,10 @@ type cdnHandler struct {
 	baseProductHandler
 }
 
+func (h *cdnHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *cdnHandler) GetNamespace() string {
 	return CdnNamespace
 }
diff --git a/pkg/collector/handler_clb.go b/pkg/collector/handler_clb.go
index 22d3678..6ee0d97 100644
--- a/pkg/collector/handler_clb.go
+++ b/pkg/collector/handler_clb.go
@@ -18,6 +18,13 @@ type clbHandler struct {
 	baseProductHandler
 }
 
+func (h *clbHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	if len(meta.SupportDimensions) == 0 {
+		meta.SupportDimensions = append(meta.SupportDimensions, "vip")
+	}
+	return true
+}
+
 func (h *clbHandler) GetNamespace() string {
 	return ClbNamespace
 }
diff --git a/pkg/collector/handler_clb7.go b/pkg/collector/handler_clb7.go
new file mode 100644
index 0000000..3acc660
--- /dev/null
+++ b/pkg/collector/handler_clb7.go
@@ -0,0 +1,60 @@
+package collector
+
+import (
+	"github.com/go-kit/kit/log"
+	"github.com/tencentyun/tencentcloud-exporter/pkg/metric"
+	"github.com/tencentyun/tencentcloud-exporter/pkg/util"
+	"strings"
+)
+
+const (
+	Clb7Namespace     = "QCE/LOADBALANCE"
+	Clb7InstanceidKey = "vip"
+)
+
+var (
+	Clb7ExcludeMetrics = []string{
+		"outpkgratio",
+		"intrafficratio",
+		"inpkgratio",
+		"qpsratio",
+		"activeconnratio",
+		"newactiveconnratio",
+		"outtrafficratio",
+	}
+)
+
+func init() {
+	registerHandler(Clb7Namespace, defaultHandlerEnabled, NewClb7Handler)
+}
+
+type clb7Handler struct {
+	baseProductHandler
+}
+
+func (h *clb7Handler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	meta.SupportDimensions = append(meta.SupportDimensions, "vip")
+	return true
+}
+
+func (h *clb7Handler) GetNamespace() string {
+	return Clb7Namespace
+}
+
+func (h *clb7Handler) IsIncludeMetric(m *metric.TcmMetric) bool {
+	if util.IsStrInList(Clb7ExcludeMetrics, strings.ToLower(m.Meta.MetricName)) {
+		return false
+	}
+	return true
+}
+
+func NewClb7Handler(c *TcProductCollector, logger log.Logger) (handler productHandler, err error) {
+	handler = &clb7Handler{
+		baseProductHandler{
+			monitorQueryKey: Clb7InstanceidKey,
+			collector:       c,
+			logger:          logger,
+		},
+	}
+	return
+}
diff --git a/pkg/collector/handler_cos.go b/pkg/collector/handler_cos.go
index 5b2114e..1833831 100644
--- a/pkg/collector/handler_cos.go
+++ b/pkg/collector/handler_cos.go
@@ -24,6 +24,10 @@ type cosHandler struct {
 	baseProductHandler
 }
 
+func (h *cosHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *cosHandler) GetNamespace() string {
 	return CosNamespace
 }
diff --git a/pkg/collector/handler_cvm.go b/pkg/collector/handler_cvm.go
index 8877a5b..61696fd 100644
--- a/pkg/collector/handler_cvm.go
+++ b/pkg/collector/handler_cvm.go
@@ -24,6 +24,10 @@ type cvmHandler struct {
 	baseProductHandler
 }
 
+func (h *cvmHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *cvmHandler) GetNamespace() string {
 	return CvmNamespace
 }
diff --git a/pkg/collector/handler_dc.go b/pkg/collector/handler_dc.go
index af5dc23..d4feebc 100644
--- a/pkg/collector/handler_dc.go
+++ b/pkg/collector/handler_dc.go
@@ -18,6 +18,10 @@ type dcHandler struct {
 	baseProductHandler
 }
 
+func (h *dcHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *dcHandler) GetNamespace() string {
 	return DcNamespace
 }
diff --git a/pkg/collector/handler_dcx.go b/pkg/collector/handler_dcx.go
index ca1d2a6..c4dc783 100644
--- a/pkg/collector/handler_dcx.go
+++ b/pkg/collector/handler_dcx.go
@@ -18,6 +18,10 @@ type dcxHandler struct {
 	baseProductHandler
 }
 
+func (h *dcxHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *dcxHandler) GetNamespace() string {
 	return DcxNamespace
 }
diff --git a/pkg/collector/handler_mongo.go b/pkg/collector/handler_mongo.go
index 14f172b..4b7e735 100644
--- a/pkg/collector/handler_mongo.go
+++ b/pkg/collector/handler_mongo.go
@@ -17,7 +17,6 @@ const (
 )
 
 var (
-	// TODO: Disk未找到
 	MongoClusterMetrics = []string{
 		"inserts", "reads", "updates", "deletes", "counts", "aggregates", "clusterconn", "commands", "connper", "clusterdiskusage",
 		"qps", "success", "delay10", "delay50", "delay100", "timeouts",
@@ -39,6 +38,10 @@ type mongoHandler struct {
 	logger    log.Logger
 }
 
+func (h *mongoHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *mongoHandler) GetNamespace() string {
 	return MongoNamespace
 }
diff --git a/pkg/collector/handler_nat.go b/pkg/collector/handler_nat.go
index 481c6f5..629aa64 100644
--- a/pkg/collector/handler_nat.go
+++ b/pkg/collector/handler_nat.go
@@ -18,6 +18,10 @@ type natHandler struct {
 	baseProductHandler
 }
 
+func (h *natHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *natHandler) GetNamespace() string {
 	return NatNamespace
 }
diff --git a/pkg/collector/handler_redis.go b/pkg/collector/handler_redis.go
index efb5814..8d4941d 100644
--- a/pkg/collector/handler_redis.go
+++ b/pkg/collector/handler_redis.go
@@ -35,6 +35,10 @@ type redisHandler struct {
 	baseProductHandler
 }
 
+func (h *redisHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	return true
+}
+
 func (h *redisHandler) GetNamespace() string {
 	return RedisNamespace
 }
diff --git a/pkg/collector/product.go b/pkg/collector/product.go
index b00311c..ecca64f 100644
--- a/pkg/collector/product.go
+++ b/pkg/collector/product.go
@@ -13,6 +13,7 @@ import (
 	"sync"
 )
 
+// 每个产品的指标采集默认实现, 不同的逻辑通过对应的productHandler实现
 type TcProductCollector struct {
 	Namespace    string
 	MetricRepo   metric.TcmMetricRepository
@@ -118,7 +119,12 @@ func (c *TcProductCollector) loadMetricsByProductConf() (err error) {
 		for _, mname := range metricNames {
 			meta, err := c.MetricRepo.GetMeta(c.Namespace, mname)
 			if err != nil {
-				level.Error(c.logger).Log("msg", "not found metric meta", "Namespace", c.Namespace, "name", mname)
+				level.Error(c.logger).Log("msg", "Not found metric meta", "Namespace", c.Namespace, "name", mname)
+				continue
+			}
+			// 指标元数据处理, false=跳过
+			if !c.handler.CheckMetricMeta(meta) {
+				level.Error(c.logger).Log("msg", " Metric meta check fail, skip", "Namespace", c.Namespace, "name", meta.MetricName)
 				continue
 			}
 
@@ -177,6 +183,7 @@ func (c *TcProductCollector) initQuerys() (err error) {
 	return
 }
 
+// 执行所有指标的采集
 func (c *TcProductCollector) Collect(ch chan<- prometheus.Metric) (err error) {
 	wg := sync.WaitGroup{}
 	wg.Add(len(c.Querys))
@@ -203,14 +210,16 @@ func (c *TcProductCollector) Collect(ch chan<- prometheus.Metric) (err error) {
 	return
 }
 
+// 创建新的TcProductCollector, 每个产品一个
 func NewTcProductCollector(namespace string, metricRepo metric.TcmMetricRepository, conf *config.TencentConfig, logger log.Logger) (*TcProductCollector, error) {
 	factory, exists := handlerFactoryMap[namespace]
 	if !exists {
-		return nil, fmt.Errorf("Product handler not found, Namespace=%s ", namespace)
+		return nil, fmt.Errorf("product handler not found, Namespace=%s ", namespace)
 	}
 
 	var instanceRepoCache instance.TcInstanceRepository
 	if !util.IsStrInList(instance.NotSupportInstances, namespace) {
+		// 支持实例自动发现的产品
 		instanceRepo, err := instance.NewTcInstanceRepository(namespace, conf, logger)
 		if err != nil {
 			return nil, err
diff --git a/pkg/config/config.go b/pkg/config/config.go
index 9d666db..b0504ee 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -30,6 +30,8 @@ var (
 		"dcx":           "QCE/DCX",
 		"lb_public":     "QCE/LB_PUBLIC",
 		"public_clb":    "QCE/LB_PUBLIC",
+		"loadbalance":   "QCE/LOADBALANCE",
+		"7layer_clb":    "QCE/LOADBALANCE",
 		"nat_gateway":   "QCE/NAT_GATEWAY",
 		"nat":           "QCE/NAT_GATEWAY",
 		"cos":           "QCE/COS",
diff --git a/pkg/instance/cache.go b/pkg/instance/cache.go
index ea668ad..ece48c2 100644
--- a/pkg/instance/cache.go
+++ b/pkg/instance/cache.go
@@ -7,6 +7,7 @@ import (
 	"time"
 )
 
+// 可用于产品的实例的缓存, TcInstanceRepository
 type TcInstanceCache struct {
 	Raw            TcInstanceRepository
 	cache          map[string]TcInstance
diff --git a/pkg/instance/instance.go b/pkg/instance/instance.go
index 2a90c8b..c0f3bef 100644
--- a/pkg/instance/instance.go
+++ b/pkg/instance/instance.go
@@ -12,14 +12,18 @@ var NotSupportInstances = []string{
 	"QCE/CDN",
 }
 
+// 每个产品的实例对象, 可用于配置导出指标的额外label填充, 根据字段名获取值
 type TcInstance interface {
+	// 获取实例的id
 	GetInstanceId() string
 
+	// 用于查询云监控数据的主键字段, 一般是实例id
 	GetMonitorQueryKey() string
 
 	// 根据字段名称获取该字段的值, 由各个产品接口具体实现
 	GetFieldValueByName(string) (string, error)
 
+	// 获取实例raw元数据, 每个实例类型不一样
 	GetMeta() interface{}
 }
 
diff --git a/pkg/instance/repository.go b/pkg/instance/repository.go
index d035a33..9c7ac0c 100644
--- a/pkg/instance/repository.go
+++ b/pkg/instance/repository.go
@@ -10,10 +10,15 @@ var (
 	factoryMap = make(map[string]func(*config.TencentConfig, log.Logger) (TcInstanceRepository, error))
 )
 
+// 每个产品的实例对象的Repository
 type TcInstanceRepository interface {
+	// 获取实例id
 	GetInstanceKey() string
+	// 根据id, 获取实例对象
 	Get(id string) (TcInstance, error)
+	// 根据id列表, 获取所有的实例对象
 	ListByIds(ids []string) ([]TcInstance, error)
+	// 根据filters, 获取符合条件的所有实例对象
 	ListByFilters(filters map[string]string) ([]TcInstance, error)
 }
 
@@ -25,6 +30,7 @@ func NewTcInstanceRepository(namespace string, conf *config.TencentConfig, logge
 	return f(conf, logger)
 }
 
+// 将TcInstanceRepository注册到factoryMap中
 func registerRepository(namespace string, factory func(*config.TencentConfig, log.Logger) (TcInstanceRepository, error)) {
 	factoryMap[namespace] = factory
 }
diff --git a/pkg/instance/repository_clb.go b/pkg/instance/repository_clb.go
index 9993609..8bb1dcb 100644
--- a/pkg/instance/repository_clb.go
+++ b/pkg/instance/repository_clb.go
@@ -7,10 +7,13 @@ import (
 	sdk "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/clb/v20180317"
 	"github.com/tencentyun/tencentcloud-exporter/pkg/client"
 	"github.com/tencentyun/tencentcloud-exporter/pkg/config"
+	"net"
 )
 
 func init() {
+	// LB_PUBLIC、LOADBALANCE实例对象是一样的
 	registerRepository("QCE/LB_PUBLIC", NewClbTcInstanceRepository)
+	registerRepository("QCE/LOADBALANCE", NewClbTcInstanceRepository)
 }
 
 type ClbTcInstanceRepository struct {
@@ -24,13 +27,24 @@ func (repo *ClbTcInstanceRepository) GetInstanceKey() string {
 
 func (repo *ClbTcInstanceRepository) Get(id string) (instance TcInstance, err error) {
 	req := sdk.NewDescribeLoadBalancersRequest()
-	req.LoadBalancerIds = []*string{&id}
+
+	ip := net.ParseIP(id)
+	if ip != nil {
+		ipstr := ip.String()
+		req.LoadBalancerVips = []*string{&ipstr}
+	} else {
+		req.LoadBalancerIds = []*string{&id}
+	}
+
 	resp, err := repo.client.DescribeLoadBalancers(req)
 	if err != nil {
 		return
 	}
-	if len(resp.Response.LoadBalancerSet) != 1 {
-		return nil, fmt.Errorf("Response instanceDetails size != 1, id=%s ", id)
+
+	if len(resp.Response.LoadBalancerSet) == 0 {
+		return nil, fmt.Errorf("loadBalancer instance not found")
+	} else if len(resp.Response.LoadBalancerSet) > 1 {
+		return nil, fmt.Errorf("response instanceDetails size != 1")
 	}
 	meta := resp.Response.LoadBalancerSet[0]
 	instance, err = NewClbTcInstance(id, meta)
diff --git a/pkg/metric/cache.go b/pkg/metric/cache.go
index 9b3a68b..553b409 100644
--- a/pkg/metric/cache.go
+++ b/pkg/metric/cache.go
@@ -7,6 +7,7 @@ import (
 	"time"
 )
 
+// 腾讯云监控指标缓存, 在TcmMetricRepository封装一层, 指标元数据使用缓存, 转发获取数据点请求
 type TcmMetricCache struct {
 	Raw                TcmMetricRepository
 	metaCache          map[string]map[string]*TcmMeta //k1=namespace, k2=metricname(小写)
@@ -42,6 +43,7 @@ func (c *TcmMetricCache) ListSamples(metric *TcmMetric, startTime int64, endTime
 	return c.Raw.ListSamples(metric, startTime, endTime)
 }
 
+// 检测是否需要reload缓存的数据
 func (c *TcmMetricCache) checkMetaNeedreload(namespace string) (err error) {
 	v, ok := c.metaLastReloadTime[namespace]
 	if ok && v != 0 {
@@ -55,7 +57,6 @@ func (c *TcmMetricCache) checkMetaNeedreload(namespace string) (err error) {
 	if !ok {
 		np = map[string]*TcmMeta{}
 		c.metaCache[namespace] = np
-
 	}
 	for _, meta := range metas {
 		np[strings.ToLower(meta.MetricName)] = meta
diff --git a/pkg/metric/label.go b/pkg/metric/label.go
index d2aae6c..54caa18 100644
--- a/pkg/metric/label.go
+++ b/pkg/metric/label.go
@@ -19,13 +19,15 @@ func (l *Labels) Md5() (string, error) {
 	return fmt.Sprintf("%x", h.Sum(jb)), nil
 }
 
+// 代表一个指标的labels
 type TcmLabels struct {
-	queryLableNames    []string
-	instanceLabelNames []string
-	constLabels        Labels
-	Names              []string
+	queryLableNames    []string // 用于查询数据的条件标签
+	instanceLabelNames []string // 从获取实例对象动态获取字段值的标签
+	constLabels        Labels   // 用户自定义的常量标签
+	Names              []string // 所有标签名列表
 }
 
+// 根据标签名, 获取所有标签的值
 func (l *TcmLabels) GetValues(filters map[string]string, ins instance.TcInstance) (values []string, err error) {
 	nameValues := map[string]string{}
 	for _, name := range l.queryLableNames {
diff --git a/pkg/metric/meta.go b/pkg/metric/meta.go
index d82f5fe..c689679 100644
--- a/pkg/metric/meta.go
+++ b/pkg/metric/meta.go
@@ -10,6 +10,7 @@ import (
 	"strings"
 )
 
+// 代表一个云监控指标的元数据
 type TcmMeta struct {
 	Id                string
 	Namespace         string
diff --git a/pkg/metric/metric.go b/pkg/metric/metric.go
index d6a8524..a423a08 100644
--- a/pkg/metric/metric.go
+++ b/pkg/metric/metric.go
@@ -8,12 +8,13 @@ import (
 	"time"
 )
 
+// 代表一个指标, 包含多个时间线
 type TcmMetric struct {
 	Id           string
-	Meta         *TcmMeta
-	Labels       *TcmLabels
-	Series       map[string]*TcmSeries
-	StatPromDesc map[string]*prometheus.Desc
+	Meta         *TcmMeta                    // 指标元数据
+	Labels       *TcmLabels                  // 指标labels
+	Series       map[string]*TcmSeries       // 包含的多个时间线
+	StatPromDesc map[string]*prometheus.Desc // 按统计纬度的Desc, max、min、avg、last
 	Conf         *TcmMetricConfig
 }
 
@@ -94,6 +95,7 @@ func (m TcmMetric) GetSeriesSplitByBatch(batch int) (steps [][]*TcmSeries) {
 	return
 }
 
+// 创建TcmMetric
 func NewTcmMetric(meta *TcmMeta, conf *TcmMetricConfig) (*TcmMetric, error) {
 	id := fmt.Sprintf("%s-%s", meta.Namespace, meta.MetricName)
 
diff --git a/pkg/metric/query.go b/pkg/metric/query.go
index 56ffdbf..d7427af 100644
--- a/pkg/metric/query.go
+++ b/pkg/metric/query.go
@@ -4,6 +4,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+// 负责一个指标的查询管理
 type TcmQuery struct {
 	Metric            *TcmMetric
 	LatestQueryStatus int
diff --git a/pkg/metric/repository.go b/pkg/metric/repository.go
index cfd96b3..e83f376 100644
--- a/pkg/metric/repository.go
+++ b/pkg/metric/repository.go
@@ -16,13 +16,15 @@ var (
 	timeStampFormat = "2006-01-02 15:04:05"
 )
 
+// 腾讯云监控指标Repository
 type TcmMetricRepository interface {
+	// 获取指标的元数据
 	GetMeta(namespace string, name string) (*TcmMeta, error)
-
+	// 根据namespace获取所有的指标元数据
 	ListMetaByNamespace(namespace string) ([]*TcmMeta, error)
-
+	// 按时间范围获取单个时间线的数据点
 	GetSamples(series *TcmSeries, startTime int64, endTime int64) (samples *TcmSamples, err error)
-
+	// 按时间范围获取单个指标下所有时间线的数据点
 	ListSamples(metric *TcmMetric, startTime int64, endTime int64) (samplesList []*TcmSamples, err error)
 }
 
diff --git a/pkg/metric/sample.go b/pkg/metric/sample.go
index d6c43ec..3d6685a 100644
--- a/pkg/metric/sample.go
+++ b/pkg/metric/sample.go
@@ -5,11 +5,13 @@ import (
 	monitor "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/monitor/v20180724"
 )
 
+// 代表一个数据点
 type TcmSample struct {
 	Timestamp float64
 	Value     float64
 }
 
+// 代表一个时间线的多个数据点
 type TcmSamples struct {
 	Series  *TcmSeries
 	Samples []*TcmSample
diff --git a/pkg/metric/series.go b/pkg/metric/series.go
index baec866..b1cc3a8 100644
--- a/pkg/metric/series.go
+++ b/pkg/metric/series.go
@@ -5,6 +5,7 @@ import (
 	"github.com/tencentyun/tencentcloud-exporter/pkg/instance"
 )
 
+// 代表某个指标的一个时间线
 type TcmSeries struct {
 	Id          string
 	Metric      *TcmMetric