A train attendant offers a poster of the Chinese character "Fu", which means good luck, to passengers aboard the G1709 bullet train from north China's Tianjin to southwest China's Chongqing, Feb. 3, 2019, ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year. (Photos: Xinhua)

Train attendants stage a performance on the G1709 bullet train traveling from north China's Tianjin to southwest China's Chongqing, Feb. 3, 2019, ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

Train attendants pose for photos with passengers aboard the G1709 bullet train from north China's Tianjin to southwest China's Chongqing, Feb. 3, 2019, ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

Attendants pose for photos with passengers aboard bullet train G184 from Qingdao of east China's Shandong Province to China's capital Beijing, Feb. 3, 2019. Staff members aboard some bullet trains departing from Qingdao held activities to extend greetings to passengers ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

An attendant offers a poster of the Chinese character "Fu", which means good luck, to passengers aboard bullet train G184 from Qingdao of east China's Shandong Province to China's capital Beijing, Feb. 3, 2019. Staff members aboard some bullet trains departing from Qingdao held activities to extend greetings to passengers ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

An attendant pastes a paper-cutting work aboard bullet train G184 from Qingdao of east China's Shandong Province to China's capital Beijing, Feb. 3, 2019. Staff members aboard some bullet trains departing from Qingdao held activities to extend greetings to passengers ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

Passengers take pictures of a performance staged by stewards aboard the G1709 bullet train running from north China's Tianjin to southwest China's Chongqing, Feb. 3, 2019, , ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

An attendant pastes a poster of the Chinese character "Fu", which means good luck, aboard bullet train G184 from Qingdao of east China's Shandong Province to China's capital Beijing, Feb. 3, 2019. Staff members aboard some bullet trains departing from Qingdao held activities to extend greetings to passengers ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.

Train conductor Gao Jian talks with passengers aboard bullet train G184 from Qingdao of east China's Shandong Province to China's capital Beijing, Feb. 3, 2019. Staff members aboard some bullet trains departing from Qingdao held activities to extend greetings to passengers ahead of the Spring Festival, or the Chinese Lunar New Year, which falls on Feb. 5 this year.