diff --git a/backend/app/infrastructure/data_sources/sina.py b/backend/app/infrastructure/data_sources/sina.py
index 7a09e0c..ed68b86 100644
--- a/backend/app/infrastructure/data_sources/sina.py
+++ b/backend/app/infrastructure/data_sources/sina.py
@@ -69,10 +69,15 @@ def _to_sina_symbol(symbol: str) -> str:
 
 
 def _extract_jsonp(payload: str) -> list[dict[str, Any]]:
-    match = re.search(r"=\s*(\[.*\])\s*$", payload.strip(), flags=re.DOTALL)
-    if not match:
+    """从 JSONP 中提取数组：容忍前导注释 / var data=([...]) 包裹 / 尾部杂字符。
+
+    直接取首个 '[' 与末个 ']' 之间的内容（行情数组为扁平结构，无嵌套数组）。
+    """
+    start = payload.find("[")
+    end = payload.rfind("]")
+    if start == -1 or end <= start:
         raise DataSourceError("新浪行情返回格式无法解析")
-    return json.loads(match.group(1))
+    return json.loads(payload[start : end + 1])
 
 
 def _d(value) -> Decimal | None:
diff --git a/backend/tests/test_jobs_experiments.py b/backend/tests/test_jobs_experiments.py
index fa15837..0f7370a 100644
--- a/backend/tests/test_jobs_experiments.py
+++ b/backend/tests/test_jobs_experiments.py
@@ -11,7 +11,12 @@ from app.domain.entities.research import (
     JobStatus,
     ResearchSpec,
 )
+from app.infrastructure.persistence.sqlalchemy import session as sess_mod
 from app.infrastructure.persistence.sqlalchemy.base import Base
+from app.infrastructure.persistence.sqlalchemy.models.market import (
+    StockDailyModel,
+    StockModel,
+)
 from app.infrastructure.persistence.sqlalchemy.repositories.jobs_impl import (
     SqlAlchemyExperimentRepository,
     SqlAlchemyJobRepository,
@@ -142,8 +147,42 @@ class TestJobExecutor:
             assert done.error
 
 
+@pytest.fixture()
+def seeded_api_db(tmp_path, monkeypatch) -> None:
+    """把全局 SessionLocal 指向 tmp 种子库（5 只股票 × 300 交易日），
+    Job 后台执行跑小数据，避免依赖真实全市场库（779 万行）导致过慢。"""
+    from sqlalchemy.orm import sessionmaker
+
+    engine = create_engine(f"sqlite:///{tmp_path / 'api.db'}", future=True)
+    Base.metadata.create_all(engine)
+    sf = sessionmaker(bind=engine, expire_on_commit=False)
+    drifts = {s: 0.003 - 0.0015 * i for i, s in enumerate(_SYMS)}
+    daily = synthetic_daily(drifts, n=320)
+    with sf() as session:
+        for i, sym in enumerate(_SYMS):
+            session.add(StockModel(symbol=sym, name=f"测试股份{i}", list_date=date(1999, 1, 1)))
+        rows = [
+            {
+                "symbol": r.symbol,
+                "trade_date": r.trade_date,
+                "source": "tushare",
+                "adjust": "none",
+                "open": float(r.open),
+                "high": float(r.high),
+                "low": float(r.low),
+                "close": float(r.close),
+                "volume": float(r.volume),
+                "amount": float(r.amount),
+            }
+            for r in daily.itertuples()
+        ]
+        session.execute(StockDailyModel.__table__.insert(), rows)
+        session.commit()
+    monkeypatch.setattr(sess_mod, "SessionLocal", sf)
+
+
 class TestJobsApi:
-    def test_submit_then_query(self) -> None:
+    def test_submit_then_query(self, seeded_api_db) -> None:
         with TestClient(app) as client:
             resp = client.post("/api/jobs", json=_spec().model_dump(mode="json"))
             assert resp.status_code == 200
@@ -161,17 +200,25 @@ class TestJobsApi:
             assert state["spec"]["factors"][0]["name"] == "momentum_20"
             assert state["experiment_id"]
 
-    def test_unknown_job_404(self) -> None:
+    def test_unknown_job_404(self, seeded_api_db) -> None:
         with TestClient(app) as client:
             assert client.get("/api/jobs/JOB-NOPE").status_code == 404
 
-    def test_experiments_list_and_detail(self) -> None:
+    def test_experiments_list_and_detail(self, seeded_api_db) -> None:
         with TestClient(app) as client:
-            resp = client.get("/api/experiments")
+            # 先跑一个 job 生成归档，再验证列表与详情
+            resp = client.post("/api/jobs", json=_spec().model_dump(mode="json"))
             assert resp.status_code == 200
-            exps = resp.json()
-            if exps:  # 本机真实库中可能有历史实验；detail 可读即通过
-                first = exps[0]
-                detail = client.get(f"/api/experiments/{first['id']}")
-                assert detail.status_code == 200
-                assert "result" in detail.json()
+            job_id = resp.json()["job_id"]
+            for _ in range(30):
+                st = client.get(f"/api/jobs/{job_id}").json()["status"]
+                if st in (JobStatus.SUCCESS, JobStatus.FAILED):
+                    break
+            assert st == JobStatus.SUCCESS
+
+            exps = client.get("/api/experiments").json()
+            assert exps, "job 成功后应有 Experiment 归档"
+            first = exps[0]
+            detail = client.get(f"/api/experiments/{first['id']}")
+            assert detail.status_code == 200
+            assert "result" in detail.json()
diff --git a/backend/tests/test_sina_provider.py b/backend/tests/test_sina_provider.py
index 6c3775f..8f7560d 100644
--- a/backend/tests/test_sina_provider.py
+++ b/backend/tests/test_sina_provider.py
@@ -154,3 +154,18 @@ class TestFormatParity:
         # 与 Tushare 同 schema：必备字段齐全
         assert bar.symbol == "600519.SH"
         assert bar.close is not None
+
+
+class TestJsonpParens:
+    def test_real_world_paren_wrapped(self) -> None:
+        payload = 'var data=([{"day":"2024-08-30","close":"1710.0"}])'
+        rows = _extract_jsonp(payload)
+        assert rows[0]["close"] == "1710.0"
+
+    def test_with_leading_comment_and_trailing_semicolon(self) -> None:
+        payload = (
+            "/*<script>location.href='//sina.com';</script>*/\n"
+            'var data=([{"day":"2024-08-30","close":"1710.0"}]);'
+        )
+        rows = _extract_jsonp(payload)
+        assert rows[0]["close"] == "1710.0"