By DENG RUI and TAN YINGZI | China Daily | Updated: 2021-07-27 09:21 Share CLOSE The Guiyuan Garden is among the abundant wartime historical and cultural sites in Chongqing. [Photo provided to China Daily] On July 1, the Communist Party of China, the world's largest political party with more than 90 million members, celebrated its centenary. As the summer tourist season begins and interprovincial group tours resume around the country, red tourism continues to boom in Chongqing, a city which boasts abundant wartime historical and cultural sites and relics. Chongqing has a glorious revolutionary history. The city made major contributions to consolidating and strengthening the united front, an early form of multiparty cooperation, and winning the victory of the new-democratic revolution.