Passengers check in at the Shijiazhuang railway station in Shijiazhuang, north China's Hebei Province, Oct. 7, 2021. Transportation hubs across China are witnessing the peak of return passengers as the week-long holiday draws to an end on Thursday.Photo:Xinhua

Passengers check in via the facial recognition system at the Shijiazhuang railway station in Shijiazhuang, north China's Hebei Province, Oct. 7, 2021. Transportation hubs across China are witnessing the peak of return passengers as the week-long holiday draws to an end on Thursday.Photo:Xinhua

Passengers check in at the Shijiazhuang railway station in Shijiazhuang, north China's Hebei Province, Oct. 7, 2021. Transportation hubs across China are witnessing the peak of return passengers as the week-long holiday draws to an end on Thursday.Photo:Xinhua

Passengers take selfies before their return trip at the Suzhou railway station in Suzhou, east China's Jiangsu Province, Oct. 7, 2021. Transportation hubs across China are witnessing the peak of return passengers as the week-long holiday draws to an end on Thursday.Photo:Xinhua

Passengers wait to board the train at the Wuhan railway station in Wuhan, central China's Hubei Province, Oct. 7, 2021. Transportation hubs across China are witnessing the peak of return passengers as the week-long holiday draws to an end on Thursday.Photo:Xinhua

Passengers are about to board the train at the Wuhan railway station in Wuhan, central China's Hubei Province, Oct. 7, 2021. Transportation hubs across China are witnessing the peak of return passengers as the week-long holiday draws to an end on Thursday.Photo:Xinhua