Mr Shao,
Please don't post these things outside the commercial seller's subforum. You will only get yourself into trouble posting commercially related stuff in reviews.
Please follow BLF's rules for commercial sellers: https://budgetlightforum.com/forum/misc/commercial
I suggest you move this information to my FC11 sales thread instead: https://budgetlightforum.com/t/-/60207
Thanks a lot for your understanding. :-)