diff --git a/src/future/order.rs b/src/future/order.rs
index 3fca8d8..78375dc 100644
--- a/src/future/order.rs
+++ b/src/future/order.rs
@@ -467,9 +467,8 @@ pub async fn query_open_positioning_order(
                 {
                     // update values in [future_ordered_coin_list]
                     let table_name = String::from("future_ordered_coin_list");
-                    let mut value_build = String::from("\'");
+                    let mut value_build = String::new();
                     value_build.push_str(T.get("status").unwrap().as_str().unwrap());
-                    value_build.push('\'');
 
                     // calculate values to be updated
                     if future_trade_fee.user_level.is_some() {