fix(service): 修复退款订单金额

@@ -34,7 +34,6 @@ import com.infoloop.tianting.server.session.UserTypeEnum;
 import com.infoloop.tianting.utils.DateUtil;
 import com.infoloop.tianting.utils.EncryptionUtil;
 import com.infoloop.tianting.utils.JsonUtil;
-import java.math.RoundingMode;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import okhttp3.OkHttpClient;
@@ -51,6 +50,7 @@ import org.springframework.web.client.RestTemplate;
 
 import java.io.IOException;
 import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.text.MessageFormat;
@@ -347,7 +347,7 @@ public class PayServiceClient {
 
     BigDecimal price =
         new BigDecimal(orderById.getPayPrice())
-            .divide(new BigDecimal(100), 2, RoundingMode.HALF_UP);
+            .divide(new BigDecimal(100), 2, RoundingMode.HALF_UP).negate();
 
     String payContentStr =
         orderById.getId()