1. Calculate the time difference: time difference = number of large time zones-number of hour time zones (note: the eastern time zone is represented by a positive number, and the western time zone is represented by a negative number).

2. Time zone calculation: required time zone = time difference of known time zone (note: required time zone is east of known time zone-the easternmost time zone is east 12, and required time zone = known time zone+time difference, and vice versa). For example, when Beijing time is known at 5: 00 on March 26th, the time of East 10th District, East 1st District and West 5th District is calculated. Time difference between East Zone 10 and East Zone 8: 10-8 = 2.