diff --git a/src/models/qwen3vl/model.rs b/src/models/qwen3vl/model.rs
index 518a8b5..e556fb6 100644
--- a/src/models/qwen3vl/model.rs
+++ b/src/models/qwen3vl/model.rs
@@ -516,19 +516,11 @@ impl Qwen3VLVisionModel {
         let sin = emb.sin()?;
         let cu_seqlens = grid_thw.i((.., 1))?.mul(&grid_thw.i((.., 2))?)?;
         let grid_t = grid_thw.i((.., 0))?.to_vec1::<u32>()?;
-        let cu_seqlens_full = match cu_seqlens.rank() {
-            1 => cu_seqlens.repeat(grid_t[0] as usize)?,
-            2 => {
-                let mut cu_seqlens_repeat = Vec::new();
-                for (index, t) in grid_t.iter().enumerate() {
-                    cu_seqlens_repeat.push(cu_seqlens.i(index)?.repeat(*t as usize)?);
-                }
-                Tensor::cat(&cu_seqlens_repeat, 0)?.flatten_all()?
-            }
-            _ => {
-                return Err(anyhow!(format!("create cu_seqlens error")));
-            }
-        };
+        let mut cu_seqlens_repeat = Vec::new();
+        for (index, t) in grid_t.iter().enumerate() {
+            cu_seqlens_repeat.push(cu_seqlens.i(index)?.repeat(*t as usize)?);
+        }
+        let cu_seqlens_full = Tensor::cat(&cu_seqlens_repeat, 0)?.flatten_all()?;
         let cu_seqlens = cu_seqlens_full
             .to_dtype(DType::F64)?
             .cumsum(0)?
@@ -895,6 +887,8 @@ impl Qwen3VLModel {
                 let mut v_thw_vec = Vec::new();
                 for (index, t) in grid_t.iter().enumerate() {
                     let mut thw_i = thw.i(index)?.to_vec1::<u32>()?;
+                    // [12, 30, 50]
+                    // [1, 30, 50]*t
                     thw_i[0] = 1;
                     v_thw_vec.push(
                         Tensor::new(thw_i, thw.device())?
diff --git a/tests/messy_test.rs b/tests/messy_test.rs
index 86fec2c..a64b3c8 100644
--- a/tests/messy_test.rs
+++ b/tests/messy_test.rs
@@ -1,14 +1,20 @@
 use aha::utils::tensor_utils::bitor_tensor;
 use anyhow::Result;
-use candle_core::Tensor;
+use candle_core::{IndexOp, Tensor};
 
 #[test]
 fn messy_test() -> Result<()> {
     let device = &candle_core::Device::Cpu;
-    let image_mask = Tensor::new(vec![0u32, 0, 0, 1, 0, 1], device)?;
-    let video_mask = Tensor::new(vec![0u32, 1, 0, 1, 0, 1], device)?;
-    let visual_mask = bitor_tensor(&image_mask, &video_mask)?;
-    println!("visual_mask: {}", visual_mask);
+    let grid_thw = Tensor::new(vec![vec![3u32, 12, 20], vec![5, 30, 25]], device)?;
+    let cu_seqlens = grid_thw.i((.., 1))?.mul(&grid_thw.i((.., 2))?)?;
+    let grid_t = grid_thw.i((.., 0))?.to_vec1::<u32>()?;
+    println!("cu_seqlens: {}", cu_seqlens);
+    println!("cu_seqlens rank: {}", cu_seqlens.rank());
+    println!("grid_t: {:?}", grid_t);
+    // let image_mask = Tensor::new(vec![0u32, 0, 0, 1, 0, 1], device)?;
+    // let video_mask = Tensor::new(vec![0u32, 1, 0, 1, 0, 1], device)?;
+    // let visual_mask = bitor_tensor(&image_mask, &video_mask)?;
+    // println!("visual_mask: {}", visual_mask);
     // let x = Tensor::arange_step(0.0_f32, 5., 0.5, &device)?;
     // let x_int = x.to_dtype(candle_core::DType::U32)?;
     // println!("x: {}", x);