diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/src/main/java/com/bigdata/controller/NWQualityController.java b/src/main/java/com/bigdata/controller/NWQualityController.java
new file mode 100644
index 0000000..c00f482
--- /dev/null
+++ b/src/main/java/com/bigdata/controller/NWQualityController.java
@@ -0,0 +1,111 @@
+package com.bigdata.controller;
+
+import com.bigdata.dto.NWQualityQueryRequest;
+import com.bigdata.dto.RegionStatisticsDTO;
+import com.bigdata.entity.NWQuality;
+import com.bigdata.service.NWQualityService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * 访问 Phoenix 中 NWQUALITY 表的接口
+ */
+@RestController
+public class NWQualityController {
+
+    @Autowired
+    private NWQualityService nwQualityService;
+
+    /**
+     * 查询网络质量数据，支持按运营商和时间范围筛选
+     * @param request 查询请求参数，包含 operator（运营商）和 startDate、endDate（时间范围）字段，均为可选
+     * @return 数据列表
+     */
+    @PostMapping("/nwQuality")
+    public List<NWQuality> query(@RequestBody(required = false) NWQualityQueryRequest request) {
+        // 如果请求体为空，创建默认请求对象
+        if (request == null) {
+            request = new NWQualityQueryRequest();
+        }
+        
+        String operator = null;
+        String startDate = null;
+        String endDate = null;
+        
+        if (request.getOperator() != null && !request.getOperator().trim().isEmpty()) {
+            operator = request.getOperator().trim();
+        }
+        
+        if (request.getStartDate() != null && !request.getStartDate().trim().isEmpty()) {
+            startDate = request.getStartDate().trim();
+        }
+        
+        if (request.getEndDate() != null && !request.getEndDate().trim().isEmpty()) {
+            endDate = request.getEndDate().trim();
+        }
+        
+        // 按条件查询
+        List<NWQuality> list = nwQualityService.getByCondition(operator, startDate, endDate);
+        
+        // 打印到控制台
+        System.out.println("====== nw_quality query ======");
+        System.out.println("Operator: " + (operator != null ? operator : "ALL"));
+        System.out.println("Start Date: " + (startDate != null ? startDate : "ALL"));
+        System.out.println("End Date: " + (endDate != null ? endDate : "ALL"));
+        System.out.println("Total records: " + list.size());
+        System.out.println("================================================");
+        
+        return list;
+    }
+
+    /**
+     * 统计各地区数量，支持按运营商和时间范围筛选
+     * @param request 查询请求参数，包含 operator（运营商）和 startDate、endDate（时间范围）字段，均为可选
+     * @return 地区统计列表，包含地区名称、运营商和数量
+     */
+    @PostMapping("/nwQuality/regionStatistics")
+    public List<RegionStatisticsDTO> getRegionStatistics(@RequestBody(required = false) NWQualityQueryRequest request) {
+        // 如果请求体为空，创建默认请求对象
+        if (request == null) {
+            request = new NWQualityQueryRequest();
+        }
+        
+        String operator = null;
+        String startDate = null;
+        String endDate = null;
+        
+        if (request.getOperator() != null && !request.getOperator().trim().isEmpty()) {
+            operator = request.getOperator().trim();
+        }
+        
+        if (request.getStartDate() != null && !request.getStartDate().trim().isEmpty()) {
+            startDate = request.getStartDate().trim();
+        }
+        
+        if (request.getEndDate() != null && !request.getEndDate().trim().isEmpty()) {
+            endDate = request.getEndDate().trim();
+        }
+        
+        // 按条件查询地区统计
+        List<RegionStatisticsDTO> result = nwQualityService.getRegionStatistics(operator, startDate, endDate);
+        
+        // 打印到控制台
+        System.out.println("====== region statistics ======");
+        System.out.println("Operator: " + (operator != null ? operator : "ALL"));
+        System.out.println("Start Date: " + (startDate != null ? startDate : "ALL"));
+        System.out.println("End Date: " + (endDate != null ? endDate : "ALL"));
+        System.out.println("Total regions: " + result.size());
+        for (RegionStatisticsDTO dto : result) {
+            System.out.println("Region: " + dto.getRegion() + 
+                             ", Operator: " + dto.getOperator() + 
+                             ", Count: " + dto.getCount());
+        }
+        System.out.println("================================================");
+        
+        return result;
+    }
+}
diff --git a/src/main/java/com/bigdata/service/impl/NWQualityServiceImpl.java b/src/main/java/com/bigdata/service/impl/NWQualityServiceImpl.java
new file mode 100644
index 0000000..bc941e0
--- /dev/null
+++ b/src/main/java/com/bigdata/service/impl/NWQualityServiceImpl.java
@@ -0,0 +1,27 @@
+package com.bigdata.service.impl;
+
+import com.bigdata.dao.NWQualityMapper;
+import com.bigdata.dto.RegionStatisticsDTO;
+import com.bigdata.entity.NWQuality;
+import com.bigdata.service.NWQualityService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class NWQualityServiceImpl implements NWQualityService {
+
+    @Autowired
+    private NWQualityMapper nwQualityMapper;
+
+    @Override
+    public List<NWQuality> getByCondition(String operator, String startDate, String endDate) {
+        return nwQualityMapper.selectByCondition(operator, startDate, endDate);
+    }
+
+    @Override
+    public List<RegionStatisticsDTO> getRegionStatistics(String operator, String startDate, String endDate) {
+        return nwQualityMapper.selectRegionStatistics(operator, startDate, endDate);
+    }
+}
diff --git a/src/main/resources/mapper/NWQualityMapper.xml b/src/main/resources/mapper/NWQualityMapper.xml
index 7b345b9..431a09f 100644
--- a/src/main/resources/mapper/NWQualityMapper.xml
+++ b/src/main/resources/mapper/NWQualityMapper.xml
@@ -28,10 +28,10 @@
                 AND "PROVINCE" LIKE CONCAT('%', #{operator})
             </if>
             <if test="startDate != null and startDate != ''">
-                AND "DAYTIME" &gt;= TO_TIMESTAMP(CONCAT(#{startDate}, ' 00:00:00'), 'yyyy-MM-dd HH:mm:ss')
+                AND "DAYTIME" &gt;= TO_NUMBER(CONCAT(REPLACE(#{startDate}, '-', ''), '000000'))
             </if>
             <if test="endDate != null and endDate != ''">
-                AND "DAYTIME" &lt;= TO_TIMESTAMP(CONCAT(#{endDate}, ' 23:59:59'), 'yyyy-MM-dd HH:mm:ss')
+                AND "DAYTIME" &lt;= TO_NUMBER(CONCAT(REPLACE(#{endDate}, '-', ''), '235959'))
             </if>
         </where>
         ORDER BY "DAYTIME" DESC
@@ -61,10 +61,10 @@
                 AND "PROVINCE" LIKE CONCAT('%', #{operator})
             </if>
             <if test="startDate != null and startDate != ''">
-                AND "DAYTIME" &gt;= TO_TIMESTAMP(CONCAT(#{startDate}, ' 00:00:00'), 'yyyy-MM-dd HH:mm:ss')
+                AND "DAYTIME" &gt;= TO_NUMBER(CONCAT(REPLACE(#{startDate}, '-', ''), '000000'))
             </if>
             <if test="endDate != null and endDate != ''">
-                AND "DAYTIME" &lt;= TO_TIMESTAMP(CONCAT(#{endDate}, ' 23:59:59'), 'yyyy-MM-dd HH:mm:ss')
+                AND "DAYTIME" &lt;= TO_NUMBER(CONCAT(REPLACE(#{endDate}, '-', ''), '235959'))
             </if>
         </where>
         GROUP BY