Chuyển đổi thời gian từ Hpa-An sang giờ Cheb
21:15:10
-5.5
15:45:10
+4.5
+4.5
+2.5
+2.5
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+0
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-2
-3