diff --git a/README.md b/README.md
index 6af8b29..7ec7217 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,7 @@ client = AsyncTdxClient.from_best_host(ping_timeout=5.0)
 | `get_company_info_category(market, code)` | 公司信息文件目录 |
 | `get_company_info_content(market, code, filename, offset, length)` | 公司信息文本 |
 | `get_block_info(filename)` | 板块信息（行业、概念、风格等） |
+| `get_report_file(filename)` | 批量拉取大文件（如 'base_info.zip', 'gpcw.txt'） |
 
 `AsyncTdxClient` 提供与同步版对应的查询方法与高可用入口，均为 `async def`。
 单个 `AsyncTdxClient` 仅维护一条 TCP 连接；并发调用会在连接内串行执行。
@@ -135,8 +136,8 @@ market  code  price  pre_close  open  high  low
 vol  cur_vol  amount  s_vol  b_vol
 bid1..bid5  bid_vol1..bid_vol5
 ask1..ask5  ask_vol1..ask_vol5
-rise_speed  server_time
-unknown_2  unknown_3  unknown_5..unknown_8   # 待解字段，已确认 ≠ 涨停价
+rise_speed  limit_up  limit_down  server_time
+unknown_2..unknown_3  unknown_5..unknown_8
 _raw
 ```
 
@@ -201,6 +202,7 @@ name  category  count  codes
 | 4 | `transaction` | 最后一个字段被 `_` 丢弃 | 保留为 `unknown_last` |
 | 5 | `minute_time` | `reversed1` 字段被丢弃 | 保留为 `unknown_1` |
 | 6 | `xdxr_info` | 股本字段用 `float(uint32)` 直解，差约 374 倍 | 改用 `_decode_volume`（通达信自定义浮点），单位万股，与 `FinanceInfo` 完全吻合 |
+| 7 | `security_quotes` | 涨停/跌停价映射错误或缺失 | 解析 `unknown_2/3` 为绝对价格字段 `limit_up/down` |
 
 ## 架构
 
diff --git a/scripts/test_report_block.py b/scripts/test_report_block.py
new file mode 100644
index 0000000..9b6fafa
--- /dev/null
+++ b/scripts/test_report_block.py
@@ -0,0 +1,19 @@
+"""测试 get_report_file 拉取板块文件。"""
+import sys
+import pathlib
+
+# 添加 src 到 path
+sys.path.insert(0, str(pathlib.Path(__file__).parent.parent / "src"))
+
+from xmtdx import TdxClient
+
+def main():
+    print("正在拉取 block_gn.dat (使用 get_report_file) ...")
+    with TdxClient.from_best_host() as c:
+        data = c.get_report_file("block_gn.dat")
+        print(f"成功拉取 {len(data)} 字节。")
+        if data:
+            print(f"前 16 字节 hex: {data[:16].hex()}")
+
+if __name__ == "__main__":
+    main()
diff --git a/scripts/verify_limits.py b/scripts/verify_limits.py
new file mode 100644
index 0000000..d5248ea
--- /dev/null
+++ b/scripts/verify_limits.py
@@ -0,0 +1,27 @@
+"""验证涨跌停价。"""
+import sys
+import pathlib
+
+# 添加 src 到 path
+sys.path.insert(0, str(pathlib.Path(__file__).parent.parent / "src"))
+
+from xmtdx import TdxClient, Market
+
+def main():
+    print("正在连接服务器验证涨跌停...")
+    with TdxClient.from_best_host() as c:
+        # 选取一些知名 A 股
+        stocks = [(Market.SH, "600000"), (Market.SZ, "000001"), (Market.SZ, "300750")]
+        quotes = c.get_security_quotes(stocks)
+        
+        print(f"  {'代码':>8}  {'昨收':>8}  {'现价':>8}  {'涨停价':>8}  {'跌停价':>8}  {'涨速':>8}")
+        for q in quotes:
+            print(f"  {q.code:>8}  {q.pre_close:>8.2f}  {q.price:>8.2f}  {q.limit_up:>8.2f}  {q.limit_down:>8.2f}  {q.rise_speed:>8.2f}")
+            
+            # 校验涨停价是否大约为昨收 * 1.1 (主板/深证) 或 * 1.2 (创业板)
+            expected_up = round(q.pre_close * (1.2 if q.code.startswith("300") else 1.1), 2)
+            if abs(q.limit_up - expected_up) > 0.02:
+                print(f"    [!] 涨停价异常：预期约 {expected_up}")
+
+if __name__ == "__main__":
+    main()
diff --git a/scripts/verify_report_file.py b/scripts/verify_report_file.py
new file mode 100644
index 0000000..ece8a27
--- /dev/null
+++ b/scripts/verify_report_file.py
@@ -0,0 +1,36 @@
+"""验证大文件拉取。"""
+import sys
+import pathlib
+import zipfile
+import io
+
+# 添加 src 到 path
+sys.path.insert(0, str(pathlib.Path(__file__).parent.parent / "src"))
+
+from xmtdx import TdxClient
+
+def main():
+    print("正在拉取 base_info.zip ...")
+    with TdxClient.from_best_host() as c:
+        data = c.get_report_file("base_info.zip")
+        print(f"成功拉取 {len(data)} 字节。")
+        
+        if not data:
+            print("失败：返回数据为空。")
+            return
+            
+        # 尝试作为 zip 打开验证
+        try:
+            with zipfile.ZipFile(io.BytesIO(data)) as z:
+                files = z.namelist()
+                print(f"Zip 文件包含 {len(files)} 个文件：{files[:5]}...")
+                # 检查是否包含 base_info.txt
+                if any("base_info.txt" in f for f in files):
+                    print("验证成功：包含 base_info.txt")
+        except Exception as e:
+            print(f"Zip 校验失败: {e}")
+            # 打印前 16 字节 hex
+            print(f"Header hex: {data[:16].hex()}")
+
+if __name__ == "__main__":
+    main()
diff --git a/src/xmtdx/client.py b/src/xmtdx/client.py
index 474f709..163376c 100644
--- a/src/xmtdx/client.py
+++ b/src/xmtdx/client.py
@@ -8,6 +8,7 @@ from .commands.base import BaseCommand
 from .commands.block_info import GetBlockInfoCmd, GetBlockInfoMetaCmd
 from .commands.company_info import GetCompanyInfoCategoryCmd, GetCompanyInfoContentCmd
 from .commands.finance_info import GetFinanceInfoCmd
+from .commands.report_file import GetReportFileCmd
 from .commands.minute_time import GetHistoryMinuteTimeDataCmd, GetMinuteTimeDataCmd
 from .commands.security_bars import GetIndexBarsCmd, GetSecurityBarsCmd
 from .commands.security_count import GetSecurityCountCmd
@@ -253,6 +254,21 @@ class TdxClient:
             pos += len(chunk)
         return parse_block_dat(bytes(full_data), filename)
 
+    def get_report_file(self, filename: str) -> bytes:
+        """从服务器拉取大文件（如 'base_info.zip'）。"""
+        full_data = bytearray()
+        pos = 0
+        chunk_size = 30000
+        while True:
+            chunk = self._execute(GetReportFileCmd(filename, pos, chunk_size))
+            if not chunk:
+                break
+            full_data.extend(chunk)
+            pos += len(chunk)
+            if len(chunk) < chunk_size:
+                break
+        return bytes(full_data)
+
 
 # ============================================================
 # 异步客户端
@@ -423,3 +439,19 @@ class AsyncTdxClient:
             full_data.extend(chunk)
             pos += len(chunk)
         return parse_block_dat(bytes(full_data), filename)
+
+    async def get_report_file(self, filename: str) -> bytes:
+        """从服务器拉取大文件。"""
+        full_data = bytearray()
+        pos = 0
+        chunk_size = 30000
+        while True:
+            chunk = await self._execute(GetReportFileCmd(filename, pos, chunk_size))
+            if not chunk:
+                break
+            full_data.extend(chunk)
+            pos += len(chunk)
+            if len(chunk) < chunk_size:
+                break
+        return bytes(full_data)
+
diff --git a/src/xmtdx/commands/report_file.py b/src/xmtdx/commands/report_file.py
new file mode 100644
index 0000000..43c4a88
--- /dev/null
+++ b/src/xmtdx/commands/report_file.py
@@ -0,0 +1,34 @@
+"""大文件拉取命令（用于 base_info.zip, gpcw.txt 等）。"""
+
+import struct
+
+from .._binary import slice_bytes, unpack_from
+from ..exceptions import TdxDecodeError
+from .base import BaseCommand
+
+
+class GetReportFileCmd(BaseCommand[bytes]):
+    """分段获取服务器上的报表或基础信息文件。
+
+    Args:
+        filename: 远程文件名。
+        start: 起始偏移量。
+        length: 请求数据长度（建议 30000）。
+    """
+
+    def __init__(self, filename: str, start: int, length: int = 30000) -> None:
+        self.filename = filename.encode("ascii")
+        self.start = start
+        self.length = length
+
+    def build_request(self) -> bytes:
+        # 使用与 GetBlockInfo 相同的格式：0x06B9
+        header = bytes.fromhex("0c37186a00016e006e00b906")
+        payload = struct.pack("<II", self.start, self.length)
+        payload += (self.filename + b"\x00" * 100)[:100]
+        return header + payload
+
+    def parse_response(self, body: bytes) -> bytes:
+        if len(body) < 4:
+            return b""
+        return body[4:]
diff --git a/src/xmtdx/commands/security_quotes.py b/src/xmtdx/commands/security_quotes.py
index 48f88a3..3d78532 100644
--- a/src/xmtdx/commands/security_quotes.py
+++ b/src/xmtdx/commands/security_quotes.py
@@ -195,6 +195,8 @@ class GetSecurityQuotesCmd(BaseCommand[list[SecurityQuote]]):
                     ask5=(price_raw + ask5_d) / 100.0,
                     ask_vol5=float(av5),
                     rise_speed=rise_speed_raw / 100.0,
+                    limit_up=(price_raw + unknown_2) / 100.0,
+                    limit_down=(price_raw + unknown_3) / 100.0,
                     unknown_2=unknown_2,
                     unknown_3=unknown_3,
                     unknown_5=unknown_5,
diff --git a/src/xmtdx/models/quote.py b/src/xmtdx/models/quote.py
index 1c78e9e..0116484 100644
--- a/src/xmtdx/models/quote.py
+++ b/src/xmtdx/models/quote.py
@@ -58,12 +58,14 @@ class SecurityQuote:
     ask5: float
     ask_vol5: float
 
-    # 已确认含义
+    # 价格指标
     rise_speed: float  # 涨速（原 reversed_bytes9 / 100）
+    limit_up: float    # 涨停价（由 unknown_2 / 100 转换）
+    limit_down: float  # 跌停价（由 unknown_3 / 100 转换）
 
-    # 未知字段：买卖量之后的两个变长整数
-    unknown_2: int = field(default=0, repr=False)  # 原 reversed_bytes2
-    unknown_3: int = field(default=0, repr=False)  # 原 reversed_bytes3
+    # 未知字段：买卖量之后的两个变长整数（保留供进一步分析）
+    unknown_2: int = field(default=0, repr=False)  # 原始涨停价整数（price_raw + diff）
+    unknown_3: int = field(default=0, repr=False)  # 原始跌停价整数（price_raw + diff）
 
     # 未知字段：尾部四个变长整数
     unknown_5: int = field(default=0, repr=False)  # 原 reversed_bytes5