My son is almost 10 and very similar.
For example:
"Does not know" homework
water break, bathroom break, etc whenever you told him to do real work.
99% of the time is not sitting straight on chair,
everything on floor, clothing
晚上该睡觉了,就知道准备往床上躺,还要提醒他要先刷牙先洗脸的。等等,same
Need reminder everyday for things he needs to do other than play. Headaching....
Any suggestion?