diff --git a/bonus-modules/bonus-smart-canteen/src/main/java/com/bonus/canteen/core/screening/service/DataScreeningServiceImpl.java b/bonus-modules/bonus-smart-canteen/src/main/java/com/bonus/canteen/core/screening/service/DataScreeningServiceImpl.java
index 419abb9..06e4e5c 100644
--- a/bonus-modules/bonus-smart-canteen/src/main/java/com/bonus/canteen/core/screening/service/DataScreeningServiceImpl.java
+++ b/bonus-modules/bonus-smart-canteen/src/main/java/com/bonus/canteen/core/screening/service/DataScreeningServiceImpl.java
@@ -130,14 +130,11 @@ public class DataScreeningServiceImpl implements DataScreeningService {
         BigDecimal todayNum = Optional.ofNullable(today.getNum()).orElse(BigDecimal.ZERO);
 
         if (yesterdayNum.compareTo(BigDecimal.ZERO) == 0) {
-            today.setRate(todayNum.compareTo(BigDecimal.ZERO) == 0 ? "0.0" : "100.0");
+            today.setRate(todayNum.compareTo(BigDecimal.ZERO) == 0 ? "0.0" : "∞");
         } else {
             BigDecimal rate = todayNum.subtract(yesterdayNum)
                     .divide(yesterdayNum, 4, RoundingMode.HALF_UP)
                     .multiply(BigDecimal.valueOf(100));
-            if (rate.compareTo(BigDecimal.valueOf(100)) > 0) {
-                rate = BigDecimal.valueOf(100);
-            }
             today.setRate(String.format("%.2f", rate));
         }