diff --git a/docs/todo.md b/docs/todo.md
index 7888c90..1c7dd86 100644
--- a/docs/todo.md
+++ b/docs/todo.md
@@ -36,13 +36,17 @@
 - [x] Shot 去除白边
 - [x] font size 范围优化
 - [x] 出错后前端显示
-- [ ] 大规模数据集
+- [x] 大规模数据集
+- [ ] 基于位置进行 Block 合并
+- [ ] Shot 绝对大小
+- [ ] 前端上传文件后清除 input
 - [ ] fc 挂载 OSS
 - [ ] fc-be 内网 endpoint / 挂载 OSS
 - [ ] fc 删除旧版本数据
 - [ ] Table of Contents
 - [ ] Ligature 连字识别 (Hotstuff)
 - [ ] shot 可复制文字 alt-data
+- [ ] 斜体识别
 - [ ] list 识别支持
 - [ ] figure 识别支持
 - [ ] Docker CLI
@@ -71,3 +75,79 @@ Lenzen and Sheikholeslami - 2022 - A Recursive Early-Stopping Phase King Protoco
 Wang et al. - 2019 - A survey on consensus mechanisms and mining strate
 
     - [] 8, 10, 13 shot 延展不足
+
+Abraham et al. - 2022 - Efficient and Adaptively Secure Asynchronous Binar
+
+    - [] JSONGen 有问题
+
+Aublin et al. - 2013 - Rbft Redundant byzantine fault tolerance
+
+    - [] no-common-span 提取
+
+Bankhamer et al. - 2022 - Population Protocols for Exact Plurality Consensus
+
+    - [] 3 big-block 误报，漏报
+
+Beaver 等。 - 2010 - Finding a needle in haystack Facebook's photo sto
+
+    - [] 5 6 shot 空白延展过度
+
+Chang 等。 - 2008 - Bigtable A distributed storage system for structu
+
+    - [] min() arg is an empty sequence
+
+Data_Replication_Using_Read-One-Write-All_Monitori
+
+    - [] min() arg is an empty sequence
+
+Dean and Ghemawat - 2008 - MapReduce simplified data processing on large clu
+
+    - [] 大量 big-block 漏报
+
+Gilad 等。 - 2017 - Algorand Scaling byzantine agreements for cryptoc
+
+    - [] 大量 big-block 漏报
+
+Guo 等 - 2020 - Dumbo Faster asynchronous bft protocols
+
+    - [] Invalid bandwriter header dimensions/setup
+
+Kapritsos et al. - 2012 - All about eve Execute-verify replication for mult
+
+    - [] min() arg is an empty sequence
+
+Kotla 和 Dahlin - 2004 - High throughput Byzantine fault tolerance
+
+    - [] Invalid bandwriter header dimensions/setup
+
+Li et al. - 2020 - A decentralized blockchain with high throughput an
+
+    - [] 大量 big-block 漏报
+
+Li et al. - 2020 - GHAST Breaking confirmation delay barrier in naka
+
+    - [] Invalid bandwriter header dimensions/setup
+
+Liu 等。 - 2018 - Scalable byzantine consensus via hardware-assisted
+
+    - [] Invalid bandwriter header dimensions/setup
+
+Miller 等 - 2016 - The honey badger of BFT protocols
+
+    - [] 大量 big-block 漏报
+
+practical byzantine fault tolerance
+
+    - [] big-block 排列不规则
+
+Sankar 等。 - 2017 - Survey of consensus protocols on blockchain applic
+
+    - [] min() arg is an empty sequence
+
+Scales 等。 - 2010 - The design of a practical system for fault-toleran
+
+    - [] min() arg is an empty sequence
+
+Zhu et al. - 2022 - Postharvest quality monitoring and cold chain mana
+
+    - [] min() arg is an empty sequence
diff --git a/flow_pdf/main.py b/flow_pdf/main.py
index d5a8950..2cf3549 100644
--- a/flow_pdf/main.py
+++ b/flow_pdf/main.py
@@ -13,6 +13,7 @@
 
 cfg = yaml.load(Path("./config.yaml").read_text(), Loader=yaml.FullLoader)
 
+
 def get_files_from_cfg():
     dir_input = Path(cfg["path"]["input"])
     dir_output = Path(cfg["path"]["output"])
@@ -43,13 +44,13 @@ def create_task(file_input: Path, dir_output: Path):
     try:
         e.execute()
     except Exception as e:
-        logger.error(f'{file_input.name} failed')
+        logger.error(f"{file_input.name} failed")
         file.write_text(dir_output / "error.txt", str(e))
     logger.info(f"end {file_input.name}, time = {time.perf_counter() - t:.2f}s")
 
 
 if __name__ == "__main__":
-    with concurrent.futures.ProcessPoolExecutor() as executor:
+    with concurrent.futures.ProcessPoolExecutor(max_workers=6) as executor:
         futures = [
             executor.submit(create_task, file_input, dir_output)
             for file_input, dir_output in get_files_from_cfg()
@@ -57,8 +58,8 @@ def create_task(file_input: Path, dir_output: Path):
         for future in futures:
             future.result()
 
-    if cfg['compare']['enabled']:
-        dir_target = Path(cfg['compare']['target'])
+    if cfg["compare"]["enabled"]:
+        dir_target = Path(cfg["compare"]["target"])
 
         dir_output_list = []
         for _, d in get_files_from_cfg():
@@ -67,16 +68,16 @@ def create_task(file_input: Path, dir_output: Path):
 
         for dir_output in dir_output_list:
             dir_t = dir_target / dir_output.stem
-            file_t = dir_t / "big_blocks_id" / 'big_blocks_id.json'
+            file_t = dir_t / "big_blocks_id" / "big_blocks_id.json"
             if not file_t.exists():
                 logger.warning(f"target file not found: {file_t}")
                 continue
 
-            cur = file.read_json(dir_output  / 'big_blocks_id.json')
+            cur = file.read_json(dir_output / "big_blocks_id.json")
             expect = file.read_json(file_t)
 
             if cur != expect:
-                logger.debug(f'{dir_output.stem} changed')
+                logger.debug(f"{dir_output.stem} changed")
                 for i in range(len(cur)):
                     if cur[i] != expect[i]:
                         add_list = []
@@ -87,4 +88,4 @@ def create_task(file_input: Path, dir_output: Path):
                         for j in range(len(expect[i])):
                             if expect[i][j] not in cur[i]:
                                 del_list.append(expect[i][j])
-                        logger.debug(f'page {i}, add: {add_list}, del: {del_list}')
+                        logger.debug(f"page {i}, add: {add_list}, del: {del_list}")
diff --git a/flow_pdf/worker/common.py b/flow_pdf/worker/common.py
index f76707c..be91e86 100644
--- a/flow_pdf/worker/common.py
+++ b/flow_pdf/worker/common.py
@@ -354,7 +354,8 @@ def add_annot(page, rects, annot: str, color):
         if annot:
             a = f"{annot}-{i}"
             page.add_freetext_annot(
-                (rect[0], rect[1], rect[0] + len(a) * 6, rect[1] + 10),
+                # (rect[0], rect[1], rect[0] + len(a) * 6, rect[1] + 10),
+                (rect[2] - len(a) * 6, rect[1], rect[2] , rect[1] + 10),
                 a,
                 fill_color=fitz.utils.getColor("white"),
                 border_color=fitz.utils.getColor("black"),