Goldenoldie, do you have informations about the hours that the OOP is avaliable on this tournament at Central Europe hour?
Sorry my poor english if you don´t understand the question.
I don't think there has been a TT tournament for Gaungzhou before, so I can't give you a definite answer.
They are 8 hours ahead of GMT, 7 hours ahead of CET, and you are 3 hours behind CET, so that makes them 11 hours ahead of you.
From my experience with small challengers, they often do not release their OOP till quite late, especially for the qualies, but it usually gets better later in the week.
I would guess at about 10.00 p.m. local time to start with (11.00 a.m. your time) and perhaps improving to 8.00 p.m. local time (9.00 a.m. your time). There might also be a delay before the information in given to the ATP.
Assuming matches start at 10.00 a.m. local time that would be 11.00 p.m. your time.
This is my best estimate, but please do not hold me responsible if I am wrong. I will of course try to give as much time as possible for everyone to send picks.