Today is the first day of China's Spring Rush, the annual travel peak that coincides with Spring Festival, the Chinese New Year holiday. Due to the COVID-19 outbreak in the city, the passengers flow in Tianjin's railway stations are greatly influenced. Those who want to leave Tianjin must present their green health code, a negative nucleic acid test result taken within 48 hours as well as a printed certificate to prove that you need to leave Tianjin.