How to look up historical time zones by date and location

[luofeiyu]

My dear  friends here, all i want is get   ` |LMT+8:06:00` from the 
output of tz1  `||<DstTzInfo 'Asia/Shanghai' LMT+8:06:00 STD>`|

Shall we get back to the main point?

If you are interested in it ,please say yes or no ,and how to do that ?

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