Thanks for all your replys and it had been sloved!

Very shy to say that I type wrong shell command with hwclock.
I used 'hwclock -s --date 'Oct 19 2002' 'before and it is wrong,
I miss an equation mark!!!
It should be 'hwclock -s --date='Oct 19 2002'.
without that mark hwclock think nothing to write and do nothing
so did not really write rtc.

Thx again to your kind fellows:-)


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