Research into more than 400 historic sites in Shanghai is being carried out ahead of a three-year plan to develop "red tourism" which will be released later this year.

Shanghai has about 600 revolutionary sites, but many were destroyed during war, said Shen Chao, a director at the Shanghai Tourism Administration.

The plan will cover turning "red tourism" resources into "red tourism" bases, developing "red tourism" products, and training staff to promote the development of the city's "red tourism."