Red tourism -- tourism themed on the Chinese Communist Party-led revolution -- is heating up in southwest China's Guizhou Province this summer, with tourists flocking to sites with a modern revolutionary legacy after watching the history film "Crossing."

The film has topped China's daily box office chart since its release on June 26. It recounts the Chinese Red Army's four crossings of the Chishui River on the border between southwest China's Sichuan Province and Guizhou Province during the Long March, a 12,500-km maneuver led by the Communist Party of China (CPC).

Many moviegoers nationwide are traveling to Guizhou, where the Red Army spent the longest time and had its most extensive presence, to explore the revolutionary history themselves.

"After watching the film 'Crossing,' I was deeply moved, so I travel to Guizhou's Zunyi to retrace the Long March route, which means a lot to me," said Cao Fuxing, tourist from north China's Hebei Province.

The surge in visitor numbers is particularly evident at key historical sites in the province's Zunyi City, including Tucheng Township of Xishui County, the main battlefield where the four Chishui River crossings took place and the Loushan Pass Scenic Area, where many of the film's battle scenes were shot.

To accommodate rising demand and enhance the visitor experience, local authorities in Guizhou have launched a special campaign, allowing tourists from outside the province who present ticket stubs for "Crossing" dated between June 26 and July 26 to receive a one-time free admission to a state-owned A-level tourist attraction in the province. Additionally, they are also eligible for a consumption voucher offering a 20 percent discount at participating partner merchants.