Which provinces are not hot in summer?

Tibet, Qinghai, western Sichuan, and northwestern Yunnan, the highest local temperature in summer will be below 25 degrees, but there will be altitude sickness.

Want to escape the summer, first of all, high latitude areas, such as Heilongjiang and Jilin, the temperature is generally about 5 degrees lower than that in East China.

Then there is high altitude, which you should understand.