Revert "Fix the precision loss issue in DateTime.h. I think your test was conducted in the UTC timezone, so it was difficult for you to discover this issue. If you are in another timezone, you will notice that the hour, minute, and second data will be lost. For example, in the time judgment of intelligent charging."

This reverts commit b13a07d.

Author: c-jimenez

src/types/DateTime.h

@@ -84,6 +84,7 @@ class DateTime
             m_datetime = _mkgmtime(&t);
 #else  // _MSC_VER
             m_datetime = std::mktime(&t);
+            m_datetime += t.tm_gmtoff;
             m_datetime -= (t.tm_isdst * 3600);
 #endif // _MSC_VER
             ret = true;
@@ -178,7 +179,7 @@ class DateTime
 #ifdef _MSC_VER
         gmtime_s(&t, &m_datetime);
 #else  // _MSC_VER
-        localtime_r(&m_datetime, &t);
+        gmtime_r(&m_datetime, &t);
 #endif // _MSC_VER
         ss << std::put_time(&t, "%Y-%m-%dT%TZ");
         return ss.str();