diff --git a/examples/aishell/s0/local/train.sh b/examples/aishell/s0/local/train.sh
index 85d1d42c..668ad0ea 100755
--- a/examples/aishell/s0/local/train.sh
+++ b/examples/aishell/s0/local/train.sh
@@ -19,6 +19,7 @@ fi
 
 mkdir -p exp
 
+# seed may break model convergence
 seed=10086
 if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
diff --git a/examples/aishell/s1/local/train.sh b/examples/aishell/s1/local/train.sh
index 2861e11e..f905b766 100755
--- a/examples/aishell/s1/local/train.sh
+++ b/examples/aishell/s1/local/train.sh
@@ -19,8 +19,9 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
-if [ ${seed} != 0]; then
+# seed may break model convergence
+seed=0
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
diff --git a/examples/callcenter/s1/local/train.sh b/examples/callcenter/s1/local/train.sh
index 6e63df83..d5dc15b0 100755
--- a/examples/callcenter/s1/local/train.sh
+++ b/examples/callcenter/s1/local/train.sh
@@ -19,8 +19,9 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
-if [ ${seed} != 0]; then
+# seed may break model convergence
+seed=0
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
diff --git a/examples/librispeech/s0/local/train.sh b/examples/librispeech/s0/local/train.sh
index c95659ac..6aee372a 100755
--- a/examples/librispeech/s0/local/train.sh
+++ b/examples/librispeech/s0/local/train.sh
@@ -20,7 +20,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
diff --git a/examples/librispeech/s1/local/train.sh b/examples/librispeech/s1/local/train.sh
index 17a9e28d..f905b766 100755
--- a/examples/librispeech/s1/local/train.sh
+++ b/examples/librispeech/s1/local/train.sh
@@ -19,7 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
@@ -31,7 +32,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} != 0]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/librispeech/s2/local/train.sh b/examples/librispeech/s2/local/train.sh
index a75e2bb2..66754201 100755
--- a/examples/librispeech/s2/local/train.sh
+++ b/examples/librispeech/s2/local/train.sh
@@ -19,7 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
diff --git a/examples/ted_en_zh/t0/local/train.sh b/examples/ted_en_zh/t0/local/train.sh
index 928356f9..f905b766 100755
--- a/examples/ted_en_zh/t0/local/train.sh
+++ b/examples/ted_en_zh/t0/local/train.sh
@@ -19,7 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
@@ -31,7 +32,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} != 0  ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/timit/s1/local/train.sh b/examples/timit/s1/local/train.sh
index 3e2e4522..180d8b5a 100755
--- a/examples/timit/s1/local/train.sh
+++ b/examples/timit/s1/local/train.sh
@@ -19,7 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0  ]; then
     export FLAGS_cudnn_deterministic=True
 fi
diff --git a/examples/tiny/s0/local/train.sh b/examples/tiny/s0/local/train.sh
index bf4766ee..ea29b7fc 100755
--- a/examples/tiny/s0/local/train.sh
+++ b/examples/tiny/s0/local/train.sh
@@ -19,7 +19,8 @@ fi
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0  ]; then
     export FLAGS_cudnn_deterministic=True
 fi
diff --git a/examples/tiny/s0/local/tune.sh b/examples/tiny/s0/local/tune.sh
deleted file mode 100755
index c344e77e..00000000
--- a/examples/tiny/s0/local/tune.sh
+++ /dev/null
@@ -1,33 +0,0 @@
-#!/bin/bash
-
-if [ $# != 1 ];then
-    echo "usage: tune ckpt_path"
-    exit 1
-fi
-
-# grid-search for hyper-parameters in language model
-python3 -u ${BIN_DIR}/tune.py \
---device 'gpu' \
---nproc 1 \
---config conf/deepspeech2.yaml \
---num_batches=-1 \
---batch_size=128 \
---beam_size=500 \
---num_proc_bsearch=12 \
---num_alphas=45 \
---num_betas=8 \
---alpha_from=1.0 \
---alpha_to=3.2 \
---beta_from=0.1 \
---beta_to=0.45 \
---cutoff_prob=1.0 \
---cutoff_top_n=40 \
---checkpoint_path ${1}
-
-if [ $? -ne 0 ]; then
-    echo "Failed in tuning!"
-    exit 1
-fi
-
-
-exit 0
diff --git a/examples/tiny/s1/local/train.sh b/examples/tiny/s1/local/train.sh
index 48968f63..374608fd 100755
--- a/examples/tiny/s1/local/train.sh
+++ b/examples/tiny/s1/local/train.sh
@@ -18,7 +18,8 @@ fi
 
 mkdir -p exp
 
-seed=10086
+# seed may break model convergence
+seed=0
 if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi