diff --git a/test/loss.py b/test/loss.py
index 8df1d6a..74659a5 100644
--- a/test/loss.py
+++ b/test/loss.py
@@ -20,27 +20,28 @@ import torchmetrics
 # print(output)
 
 
-target = torch.tensor([0, 1, 2])
-preds = torch.tensor([[0.1, 0.9, 0], [0.3, 10.1, 0.6], [0.2, 0.3, 0.9]])
-accuracy = torchmetrics.Accuracy(task="multiclass", num_classes=3)
-accur = accuracy(preds, target)
+# target = torch.tensor([0, 1, 2])
+# preds = torch.tensor([[0.1, 0.9, 0], [0.3, 10.1, 0.6], [0.2, 0.3, 0.9]])
+# accuracy = torchmetrics.Accuracy(task="multiclass", num_classes=3)
+# accur = accuracy(preds, target)
 
 
 metric_accuracy = torchmetrics.Accuracy(
     task="multiclass",
-    num_classes=4096,
+    num_classes=4,
 )
-shift_logits = torch.zeros((16, 2, 4096))
-shift_logits[:8, :, 2] = 10.0
-shift_labels = (torch.ones((16, 2)) * 2).long()
 
-label_mask = shift_labels != 4096
-shift_logits = shift_logits[label_mask]
-shift_labels = shift_labels[label_mask]
 
+shift_logits = torch.rand((128, 4))
+shift_labels = torch.randint(0, 4, size=(128,))
 accur = metric_accuracy(shift_logits, shift_labels)
-metric_accuracy.update(shift_logits, shift_labels)
+print(accur.numpy())
 
+shift_logits = torch.cat((shift_logits, shift_logits), dim=0)
+shift_labels = torch.cat((shift_labels, shift_labels), dim=0)
+accur = metric_accuracy(shift_logits, shift_labels)
+print(accur.numpy())
+print(accur.numpy())
 
 # torch.manual_seed(32)
 # criterion = nn.CrossEntropyLoss()
diff --git a/wit/inference.py b/wit/inference.py
new file mode 100644
index 0000000..986f284
--- /dev/null
+++ b/wit/inference.py
@@ -0,0 +1,69 @@
+import argparse
+from functools import partial
+from itertools import chain
+from typing import Dict, Tuple
+
+import datasets
+import pytorch_lightning as pl
+import torch
+from torch.utils.data import ConcatDataset, DataLoader, Dataset, random_split, Subset
+
+from lit_module import LitModule
+from tokenization_qwen import QWenTokenizer
+from logger import TBLogger
+
+from special_dataset import SpecialDataset
+from meaning_dataset import MeaningDataset, BatchGroupMeaningDataloader
+from wit.configuration import ModelConfig
+
+pretrain_model_name = None  # "qwen/Qwen-1_8B-Chat"
+learning_rate = 0.0001
+use_tril_attention_mask = None
+precision = "32-true"  # "precision:bf16-mixed,16-mixed,32-true"
+train_batch_size = 1
+val_batch_size = 2
+num_proc = 8
+max_epochs = 10
+strategy = "auto"
+resume_from_ckpt_path = None
+seed = 42
+vocab_size = 16
+
+
+if __name__ == "__main__":
+    torch.manual_seed(seed)
+
+    config = ModelConfig()
+    config.vocab_size = vocab_size
+    config.hidden_size = 1024  # 128 1024 2048  32
+    config.num_hidden_layers = 1  # 6 12 24  3
+    config.num_attention_heads = 16  # 8 8 16
+
+    lit_module = LitModule(pretrain_model_name, learning_rate, config, use_tril_attention_mask)
+    tokenizer = QWenTokenizer("./wit_b64.tiktoken", "./wit_char.tiktoken")
+
+    level_ratio = 2
+    start = vocab_size * level_ratio * level_ratio
+    end = start * level_ratio
+    size = end * level_ratio
+    size = 1024
+    raw_dataset = MeaningDataset(start, end, size, vocab_size, level_ratio)
+    train_dataset, val_dataset = raw_dataset.Split(0.95)
+
+    train_dataloader = BatchGroupMeaningDataloader(train_dataset, train_batch_size)
+    val_dataloader = BatchGroupMeaningDataloader(val_dataset, val_batch_size)
+
+    it = iter(val_dataloader)
+    batch = next(it)
+    b, l = lit_module.llm(**batch, return_dict=True)
+    print("b ")
+    print(b.detach().cpu().numpy())
+
+    # batch["input_ids"] = batch["input_ids"][0:1, :]
+    batch["input_ids"] = batch["input_ids"][1:2, :]
+    batch["labels"] = batch["labels"][1:2, :]
+    s, l = lit_module.llm(**batch, return_dict=True)
+    print("s ")
+    print(s.detach().cpu().numpy())
+
+    print("data samples:")
diff --git a/wit/meaning_dataset.py b/wit/meaning_dataset.py
index 7b8098c..5f8f032 100644
--- a/wit/meaning_dataset.py
+++ b/wit/meaning_dataset.py
@@ -188,14 +188,14 @@ class BatchGroupMeaningDataloader(Dataset):
             index_shuffle = np.arange(0, index.shape[0])
             np.random.shuffle(index_shuffle)
             index = index[index_shuffle]
-        self.index = index
+        self.indexBatch = index
 
     def __len__(self):
-        return len(self.index)
+        return len(self.indexBatch)
 
     def __getitem__(self, idx):
         # print("get idx" + str(idx))
-        return self.dataset.GetBatch(self.index[idx])
+        return self.dataset.GetBatch(self.indexBatch[idx])
 
 
 if __name__ == "__main__":
diff --git a/wit/special_dataset.py b/wit/special_dataset.py
index 243f333..d69699b 100644
--- a/wit/special_dataset.py
+++ b/wit/special_dataset.py
@@ -20,7 +20,7 @@ class SpecialDataset(Dataset):
         z = torch.zeros([size]).long()
         # self.data = torch.stack([a, b, a + b, a + b, a + b * 2]).permute(1, 0)
         # self.data = torch.stack([a, b, a, a + b / 4]).permute(1, 0).long()
-        self.data = torch.stack([a, a + a, a + a]).permute(1, 0).long()
+        self.data = torch.stack([a, a, a + a]).permute(1, 0).long()
         # self.data = torch.stack([a, b, a]).permute(1, 0).long()
         # self.data = torch.stack([a, b, a, a + a / 8, a + a / 4, a + a / 2, a + a]).permute(1, 0).long()