diff --git a/paddlespeech/t2s/exps/vits/synthesize_e2e.py b/paddlespeech/t2s/exps/vits/synthesize_e2e.py
index dac459a5b..9768a16ef 100644
--- a/paddlespeech/t2s/exps/vits/synthesize_e2e.py
+++ b/paddlespeech/t2s/exps/vits/synthesize_e2e.py
@@ -71,11 +71,6 @@ def evaluate(args):
     vits_inference = VITSInference(vits)
     # whether dygraph to static
     if args.inference_dir:
-        # acoustic model
-        # vits = jit.to_static(
-        #         vits, input_spec=[InputSpec([-1], dtype=paddle.int64)])
-        # jit.save(vits, os.path.join(inference_dir, args.am))
-        # vits = jit.load(os.path.join(inference_dir, args.am))
         vits_inference = am_to_static(
             am_inference=vits_inference,
             am=args.am,
@@ -108,8 +103,8 @@ def evaluate(args):
                 for i in range(len(phone_ids)):
                     part_phone_ids = phone_ids[i]
                     spk_id = None
-                    if am_dataset in {"aishell3", "vctk"
-                                      } and spk_num is not None:
+                    if am_dataset in {"aishell3",
+                                      "vctk"} and spk_num is not None:
                         spk_id = paddle.to_tensor(args.spk_id)
                         wav = vits_inference(part_phone_ids, spk_id)
                     else:
diff --git a/paddlespeech/t2s/models/vits/transform.py b/paddlespeech/t2s/models/vits/transform.py
index 360453cca..ea333dcff 100644
--- a/paddlespeech/t2s/models/vits/transform.py
+++ b/paddlespeech/t2s/models/vits/transform.py
@@ -81,9 +81,9 @@ def unconstrained_rational_quadratic_spline(
         min_derivative=1e-3, ):
     inside_interval_mask = (inputs >= -tail_bound) & (inputs <= tail_bound)
     outside_interval_mask = ~inside_interval_mask
-
-    # outputs = paddle.zeros(paddle.shape(inputs))
-    # logabsdet = paddle.zeros(paddle.shape(inputs))
+    # for dygraph to static
+    # 这里用 paddle.shape(x) 然后调用 zeros 会得到一个全 -1 shape 的 var
+    # 如果用 x.shape 的话可以保留确定的维度
     outputs = paddle.zeros(inputs.shape)
     logabsdet = paddle.zeros(inputs.shape)
     if tails == "linear":
@@ -93,12 +93,9 @@ def unconstrained_rational_quadratic_spline(
         constant = np.log(np.exp(1 - min_derivative) - 1)
         unnormalized_derivatives[..., 0] = constant
         unnormalized_derivatives[..., -1] = constant
-        # import pdb
-        # pdb.set_trace()
-        # print("inputs:",inputs)
-        # print("outside_interval_mask:",outside_interval_mask)
-        a = inputs[outside_interval_mask]
-        outputs[outside_interval_mask] = a
+        # for dygraph to static
+        tmp = inputs[outside_interval_mask]
+        outputs[outside_interval_mask] = tmp
         logabsdet[outside_interval_mask] = 0
     else:
         raise RuntimeError("{} tails are not implemented.".format(tails))
@@ -142,12 +139,12 @@ def rational_quadratic_spline(
         min_bin_width=1e-3,
         min_bin_height=1e-3,
         min_derivative=1e-3, ):
-
+    # for dygraph to static
     # if paddle.min(inputs) < left or paddle.max(inputs) > right:
     #     raise ValueError("Input to a transform is not within its domain")
 
     num_bins = unnormalized_widths.shape[-1]
-
+    # for dygraph to static
     # if min_bin_width * num_bins > 1.0:
     #     raise ValueError("Minimal bin width too large for the number of bins")
     # if min_bin_height * num_bins > 1.0: