To celebrate the centenary of the founding of the Communist Party of China, the Nantong Zhouji Green Expo Garden – located in Tongzhou district in Nantong city, in East China's Jiangsu province – released a notice three days in advance, informing people they would have free entry to the park on July 1. [Photo/CFP]

The free day is a huge success. The number of visitors to the park on July 1 reportedly hit about 40,000, setting a new high since the park's opening in February 2016. [Photo/CFP]

The venue is a science popularization education base in Jiangsu province and the first national 4A-level scenic spot in Tongzhou district. The garden has planted thousands of exotic flowers and plants from all over the world, which attract hordes of enthusiasts every season. [Photo/CFP]