During mth of July , how is the weather in Beijing and Chengdu ?

In July of Beijing, it is hot, with the average temperature of around 28C. Summer clothes are most needed. Besids, it may shower or have thunderstorm, so it is suggested to take along raincoat. In CD city, the lowest temp is 23C and the highest of 33C, also very hot. In general, it is not a good idea to travel these places in July.

During that time, you may visit Yunnan: Kunming, Lijiang and Shangri-la. It won't be so hot there.