diff --git a/import b/import
new file mode 100644
index 0000000000000000000000000000000000000000..da97f9edba60b47b45a301a8ef1e147336df32d8
--- /dev/null
+++ b/import
@@ -0,0 +1,16 @@
+    public List<SigOperation> listOperationBySigNo(String sigNo, String documentNo, SigOperationType operationType) {
+        List<SigOperation> sigOperations = new ArrayList<>();
+        InputValidator.checkNotBlank(sigNo, LangUtils.get("empty.sig.no"));
+        LambdaQueryWrapper<SigOperation> firstQuery = getWrapper(sigNo, documentNo, operationType);
+        SigOperation firstOne = this.getOne(firstQuery.last("order by id asc limit 1"));
+        if(ObjectUtils.isNotEmpty(firstOne)) {
+            sigOperations.add(firstOne);
+        }
+        //根据id排序到达按操作时间排序的效果，依赖操作只新增
+        LambdaQueryWrapper<SigOperation> lastQuery = getWrapper(sigNo, documentNo, operationType);
+        SigOperation lastOne = this.getOne(lastQuery.last("order by id desc limit 1"));
+        if(ObjectUtils.isNotEmpty(lastOne)) {
+            sigOperations.add(lastOne);
+        }
+        return sigOperations;
+    }
\ No newline at end of file