diff --git a/tools/pnnx/src/pass_level1.cpp b/tools/pnnx/src/pass_level1.cpp
index 1b1d971d5..c47ce0934 100644
--- a/tools/pnnx/src/pass_level1.cpp
+++ b/tools/pnnx/src/pass_level1.cpp
@@ -132,6 +132,8 @@ void pass_level1(const torch::jit::Module& mod, const std::shared_ptr<torch::jit
                 // sub_mod.dump(true, true, true);
 
                 op->attrs["data"] = sub_mod.attr(name).toTensor();
+                op->outputs[0]->type = op->attrs["data"].type;
+                op->outputs[0]->shape = op->attrs["data"].shape;
             }
         }
         else if (n->kind() == c10::prim::Constant) // || n->kind() == c10::prim::ListConstruct)
diff --git a/tools/pnnx/src/pass_level3/fuse_expression.cpp b/tools/pnnx/src/pass_level3/fuse_expression.cpp
index 7009b9f8a..d8fe46111 100644
--- a/tools/pnnx/src/pass_level3/fuse_expression.cpp
+++ b/tools/pnnx/src/pass_level3/fuse_expression.cpp
@@ -251,6 +251,9 @@ static void fuse_expression(Graph& graph, Operand* operand, std::string& expr, s
                 int64_t v;
                 zip.read_file(operand->name, (char*)&v);
 
+                if (v == std::numeric_limits<int64_t>::max()) v = INT_MAX;
+                if (v == std::numeric_limits<int64_t>::min()) v = INT_MIN;
+
                 char tmp[32];
                 sprintf(tmp, "%ld", v);
                 expr += tmp;
diff --git a/tools/pnnx/src/pass_level5/eliminate_reshape_shape_expression.cpp b/tools/pnnx/src/pass_level5/eliminate_reshape_shape_expression.cpp
index e51fa240f..662f69685 100644
--- a/tools/pnnx/src/pass_level5/eliminate_reshape_shape_expression.cpp
+++ b/tools/pnnx/src/pass_level5/eliminate_reshape_shape_expression.cpp
@@ -165,7 +165,10 @@ void eliminate_reshape_shape_expression(Graph& graph)
             if (op_expr->outputs[0]->consumers.size() == 0)
             {
                 // remove expression operator
-                op_expr->inputs[0]->remove_consumer(op_expr);
+                for (auto x : op_expr->inputs)
+                {
+                    x->remove_consumer(op_expr);
+                }
 
                 Operand* op_expr_out = op_expr->outputs[0];
 
diff --git a/tools/pnnx/src/pass_level5/eval_expression.cpp b/tools/pnnx/src/pass_level5/eval_expression.cpp
index f091da8a7..24d38a577 100644
--- a/tools/pnnx/src/pass_level5/eval_expression.cpp
+++ b/tools/pnnx/src/pass_level5/eval_expression.cpp
@@ -193,6 +193,11 @@ static std::string eval_expression(const Operator* op)
                 if (t == "int")
                 {
                     int r = int(af);
+                    if (token_is_interger_literal(a))
+                    {
+                        r = std::stoi(a);
+                    }
+
                     exprstack.push(std::to_string(r));
                 }
                 if (t == "abs")