Dear Eva,
Thanks for contacting Top China Travel!
Generally, except some special destinations such as Harbin, the recommended months to travel in China are from April to October. During this period, the weather in most parts of China is comfortable. It provides a good condition to take beautiful photos. For more details, you can see this page: /customer-center/best-time-to-visit-china.htm
Any further request or question, please feel free to contact with us.