diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 17e3f8e43..1a47ef6f4 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -499,7 +499,12 @@ export class ProblemSubmitHandler extends ProblemDetailHandler {
             if (!file || file.size === 0) throw new ValidationError('code');
             const sizeLimit = config.type === 'submit_answer' ? 128 * 1024 * 1024 : lengthLimit;
             if (file.size > sizeLimit) throw new ValidationError('file');
-            if (file.size < lengthLimit && !file.filepath.endsWith('.zip') && !setting.langs[lang].isBinary) {
+            const showReadFile = () => {
+                if (config.type === 'objective') return true;
+                if (lang === '_') return true;
+                return file.size < lengthLimit && !file.filepath.endsWith('.zip') && !setting.langs[lang].isBinary;
+            };
+            if (showReadFile()) {
                 // TODO submission file shape
                 code = await readFile(file.filepath, 'utf-8');
             } else {