July 2023 16. According to official website, Yunnan Provincial Education Bureau, Yunnan Provincial Education Department issued a notice to announce the teaching calendar of ordinary primary and secondary schools in Guangnan closed school in Yunnan Province in 2022-2023. The summer vacation began on July, 2023 16, and lasted for two months. Yunnan Province, referred to as "Yun" or "Dian" for short, is one of the 23 provinces in China, located in the southwest of China, with Kunming as its capital.