During the process, he was also motivated to enhance local cultural tourism using the discoveries made during the census. For instance, Cao and his team discovered a logo from a cigarette factory in Matian town, Zuoquan, when it served as the headquarters of the Eighth Route Army led by the Communist Party of China during the War of Resistance Against Japanese Aggression (1931-45).

He notes the logo's potential application in the development of local cultural products as a historical emblem. Subsequently, he proposed this idea to local authorities, leading to the production of ashtrays and packaging boxes featuring the logo.

"Utilization is key to preservation. Through the census, we can unearth lesser-known tourist attractions and integrate them into the local tourism development," says Cao.

Li says most of the heritage sites are protected well, but she does notice traces of erosion and feels a sense of responsibility.

Wang, their teacher, says student involvement in the census can help them progress quickly.