You only gave the year, month and day. It needs to be completed to find the complete eight characters.
Otherwise, only the first three columns (if you give the Gregorian calendar):
29 September 2002 = 23 August 2002.
Renwu (year), Ji You (month), Gengzi (day),? (when);
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One thing:
The time in the eight characters must be based on the local time of the main birthplace, not Beijing time. The eight-character test needs to take conversion of time as the place of birth in order to be correct.
Note: Beijing time is not Beijing time (1 16.4 E), but local time is 120 e. If your birthplace is near east longitude120 degrees, you can press Beijing time; If not, it is converted to local time. Please ask Baidu for the conversion method.