Hi， thanks for your reply. my problem is QB can display Chinese, but when i add Chinese character in the customer name, and input invoice, QB pop up a message said that customer is not on the list, but it did on the list. i tried so many times, i just can use a customer name without Chinese character. but before i moved to window 11, i was using window 10 and QB is working well on the Chinese character. i don't have any problem since i moved to window 11 .