diff --git a/api/main.js b/api/main.js
index 0039f9d..0997090 100644
--- a/api/main.js
+++ b/api/main.js
@@ -48,9 +48,9 @@ router.post("/", upload.single('file'), async function(req, res) {
                 console.log("No file");
             }
             // data
-            const apply_infos = req.body.apply_infos; // get data from request
-            const application_units = req.body.application_units;
-            const subsidy_amounts = req.body.subsidy_amounts;
+            const apply_infos_str = req.body.apply_infos; // get data from request
+            const application_units_str = req.body.application_units;
+            const subsidy_amounts_str = req.body.subsidy_amounts;
             const student_id = req.body.student_id;
             const student_name = req.body.student_name;
             const department_and_grade = req.body.department_and_grade;
@@ -78,18 +78,17 @@ router.post("/", upload.single('file'), async function(req, res) {
             // const application_unit = "test unit"; 
             // const subsidy = 1000;
 
-            console.log(scholarship_application_info.insertId);
-            console.log(apply_infos);
-            
             // insert each apply item into item_form
-            console.log(scholarship_application_id);
-            console.log(apply_infos);
-            console.log(application_units);
-            console.log(subsidy_amounts);
+            const apply_infos = apply_infos_str.split(',');
+            const application_units = application_units_str.split(',');
+            const subsidy_amounts = subsidy_amounts_str.split(',');
             for (let i = 0;i < apply_infos.length;i++) {
                 console.log("i="+i);
                 console.log([scholarship_application_id, apply_infos[i], application_units[i], subsidy_amounts[i]]);
-                await conn.batch("INSERT INTO item_form(`application_id`, `item_info_id`, `application_unit`, `subsidy`) VALUES(?, ?, ?, ?);", [scholarship_application_id, apply_infos[i], application_units[i], subsidy_amounts[i]]);
+                await conn.batch("INSERT INTO item_form(`application_id`, `item_info_id`, `application_unit`, `subsidy`) VALUES(?, ?, ?, ?);", 
+                    [scholarship_application_id, apply_infos[i],
+                        application_units[i]!=''?application_units[i]:null,
+                        subsidy_amounts[i]!=''?subsidy_amounts[i]:null]);
             }
             await conn.commit();
 
diff --git a/js/main.js b/js/main.js
index 68f49a2..4f7aef4 100644
--- a/js/main.js
+++ b/js/main.js
@@ -105,12 +105,15 @@ async function sendApplyData() {
         }
     }
 
-    const data = {student_id,student_name,department_and_grade, advisor_name, 
-        apply_infos,
-        application_units,
-        subsidy_amounts,
-        file
-    };
+    const data = new FormData();
+    data.append('student_id', student_id);
+    data.append('student_name', student_name);
+    data.append('department_and_grade', department_and_grade);
+    data.append('advisor_name', advisor_name);
+    data.append('apply_infos', apply_infos);
+    data.append('application_units', application_units);
+    data.append('subsidy_amounts', subsidy_amounts);
+    data.append('file', file);
     console.log(data);
     // send data
     let result = await axios.post('/api/main', data, {headers: {'Content-Type': 'multipart/form-data'}});