Tourists visit Beijing’s Palace Museum, also known as the Forbidden City, on May 1. Tickets to visit the museum over the four-day Labor Day holiday are already sold out. Photo: IC Photo

Hordes of people queue up at the 2019 Beijing International Horticultural Exhibition held in the capital’s suburban Yanqing district. Photo: IC Photo

The Sun Yat-sen Mausoleum attracts many visitors on the first day of the Labor Day holiday in Nanjing, Jiangsu province. Photo: IC Photo

Tourists cram onto Broken Bridge at the famous West Lake in Hangzhou, Zhejiang province. Photo: IC Photo

Cars sit in traffic on Northeast China’s Shenyang-Dalian highway during the Labor Day holiday. Photo: IC Photo

Travelers queue up in Hangzhou East Railway Station on May 1. Photo: IC Photo

People visit China's first National Marine Museum, which began trial operation on May 1 in Binhai New Area, North China’s Tianjin Municipality. During the trial period, the museum has opened four exhibition halls and will allow 3,000 visitors per day. Photo: IC Photo

Tourists film fireworks on Orange Island in Changsha, Hunan province on the evening of May 1. Photo: IC Photo