diff --git a/sanguo_factor/composite_weighting.py b/sanguo_factor/composite_weighting.py
index f7d9bb0..c883d62 100644
--- a/sanguo_factor/composite_weighting.py
+++ b/sanguo_factor/composite_weighting.py
@@ -155,6 +155,10 @@ def _register_all() -> None:
     文件到位即自动注册,不 ImportError).
     """
     composite_library._register_all()
+    # 幂等重挂 fund_*_neu(reload 场景 registry 被清后,neu 模块不会随之重执行,
+    # v2b 档案存在时其源必须可重建——v2b 档案上线前此缺口被 graceful 分支掩盖)
+    from .fundamental_neutralize import _register_all as _neu_register_all
+    _neu_register_all()
     register_composite_from_profile(load_profile(str(_DEFAULT_PROFILE_PATH)),
                                     _DEFAULT_COMPOSITE_NAME)
     if _V2B_PROFILE_PATH.exists():
diff --git a/tests/factor/test_fundamental_library.py b/tests/factor/test_fundamental_library.py
index 741566c..985c027 100644
--- a/tests/factor/test_fundamental_library.py
+++ b/tests/factor/test_fundamental_library.py
@@ -19,8 +19,9 @@ def _ensure_fundamental_registered():
 
 
 # 表达式可引用的列 = adapter 特征列 + 行情列 close(估值类 ÷ close×share_capital)
-# + 表达式函数名(P1 起用到 log)
-_ALLOWED = set(FEATURE_COLUMNS) | {"close", "cs_rank", "log"}
+# + 表达式函数名(P1 起用到 log;v2b 起中性化因子用 cs_neutralize)
+from sanguo_factor.fundamental_neutralize import FUND_NEU_SOURCES
+_ALLOWED = set(FEATURE_COLUMNS) | {"close", "cs_rank", "log", "cs_neutralize"}
 
 
 def _fundamental_factors() -> list[dict]:
@@ -31,7 +32,9 @@ def test_p0_32_factors_registered():
     facs = _fundamental_factors()
     names = {f["name"] for f in facs}
     # P0 32 + P1 37(35 因子 + 2 互评变体;P1 名单见 test_fundamental_p1_library)
-    assert len(facs) == 75, f"P0+P1+P1-B 应为 75 个,实际 {len(facs)}"
+    # + v2b 中性化 6(fund_*_neu,注册链经 composite_weighting 可在场,故派生不钉死)
+    assert len(facs) == 75 + len(FUND_NEU_SOURCES), \
+        f"P0+P1+P1-B+neu 应为 {75 + len(FUND_NEU_SOURCES)} 个,实际 {len(facs)}"
     # 六族代表抽查(全部名单见 fundamental_library 注释)
     expect = {
         "fund_roe_ttm", "fund_gp_over_assets",          # A
@@ -83,4 +86,4 @@ def test_registration_idempotent():
     """重复 import 不炸(注册表防重入,同 library.py 模式)."""
     import importlib
     importlib.reload(fundamental_library)
-    assert len(_fundamental_factors()) == 75
+    assert len(_fundamental_factors()) == 75 + len(FUND_NEU_SOURCES)
diff --git a/tests/factor/test_fundamental_neutralize.py b/tests/factor/test_fundamental_neutralize.py
index c37ebc9..c36756c 100644
--- a/tests/factor/test_fundamental_neutralize.py
+++ b/tests/factor/test_fundamental_neutralize.py
@@ -227,10 +227,12 @@ def test_weighting_rejects_mixed_direction_drift():
     assert get_factor(name) is None
 
 
-def test_v2b_profile_absent_skips_registration():
-    """v2b 档案不存在(仓库当前态): _register_all 不炸、不注册 composite_all18_v2b."""
+def test_v2b_profile_absent_skips_registration(tmp_path, monkeypatch):
+    """v2b 档案不存在(真档案已上线,monkeypatch 指向不存在路径模拟缺席):
+    _register_all 不炸、不注册 composite_all18_v2b."""
     _REGISTRY.pop(composite_weighting._V2B_COMPOSITE_NAME, None)
-    assert not composite_weighting._V2B_PROFILE_PATH.exists()
+    monkeypatch.setattr(composite_weighting, "_V2B_PROFILE_PATH",
+                        tmp_path / "absent_v2b.json")
     composite_weighting._register_all()  # 不应 raise
     assert get_factor(composite_weighting._V2B_COMPOSITE_NAME) is None