I'm planning to visit china at the end of july. Is it a perfect time to visit?

Hi, Tshekiso. The weather may be hot in most parts on CN. If possible, it is advised you visit CN during September~October. If there is no way to change the schedule, you may think about going to Yunnan Province. It is famous for distinctive minority groups' culture and beautiful natural scenery. The temperature in July might be around 60~80F. It is quite comfortable.
May help!