thanks for all the great suggestions.In my next practice session, I will try to:
1.do the split step more realistically
2.stay closer to the baseline and move in to take the ball early
3.be there as early as possible with adjustment steps to be well positioned and balanced
4.hit more towards the sidelines instead of up the middle
5.hit more spins
btw, to Zapvor,this is not USA, it's China.