diff --git a/app/Http/Controllers/ChartController.php b/app/Http/Controllers/ChartController.php
index a60ead9..1975058 100644
--- a/app/Http/Controllers/ChartController.php
+++ b/app/Http/Controllers/ChartController.php
@@ -69,8 +69,9 @@ class ChartController extends Controller
     {
         $riceShrimpIndustries = RiceShrimpIndustry::query()
             ->where('year', $request->query('year', date('Y')))
-            ->get()
-            ->mapWithKeys(fn ($item) => [$item['quarter'] => $item]);
+            ->get();
+
+        $mapRiceShrimpIndustries = $riceShrimpIndustries->mapWithKeys(fn ($item) => [$item['quarter'] => $item]);
 
         $quarters = [
             1 => '1季度',
@@ -84,7 +85,7 @@ class ChartController extends Controller
         $productValues = [];
 
         foreach ($quarters as $key => $value) {
-            $riceShrimpIndustry = $riceShrimpIndustries[$key] ?? null;
+            $riceShrimpIndustry = $mapRiceShrimpIndustries[$key] ?? null;
 
             if ($riceShrimpIndustry) {
                 $areas[] = $riceShrimpIndustry->area;