When the COVID-19 pandemic interrupted travel plans for her family, Chen Rundan set her eyes on the birds flying outside her window in early 2020. In the past two years, birding has become a full-fledged hobby that occupies her weekends. The sixth grader at the Fuzhou Gulou No 2 Central Primary School in Fujian province knows about a large number of different birds, and is familiar with their sounds, behavior, color patterns and habitats.