Annual report on development in western region of China(2021) Nual report on development in western region of China (2020) 并列题名：Annual report on development in western region of China(2021) Annual report on development in western region of China Annual report on development of western region in China 并列题名：Annual report on development in western region of China Annual report on economy development in western region of China Annual report on economic development in western region of China 并列题名：Annual report on development of western region in China 并列题名：Annual report on economy development in western region of China