Wang Changfu (R), waves goodbye to his three-year-old daughter on train K4051 at Beijing Railway Station in Beijing, capital of China, Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Ju huanzong)

Passengers on train K4526 wait for leaving at Shenzhen East Railway Station in Shenzhen, south China's Guangdong Province, Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Mao Siqian)

A kid watches a staff worker decorating window glass at the waiting room of Shenzhen East Railway Station in Shenzhen, south China's Guangdong Province, Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Mao Siqian)

Passengers on train K4051 wait for leaving at Beijing Railway Station in Beijing, capital of China, Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Ju huanzong)

Seven-year-old Zhang Mengran and her farther wait for getting on train K4051 at Beijing Railway Station in Beijing, capital of China, late at night on Jan. 9, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Ju huanzong)

Passengers wait to board train K4526 at Shenzhen East Railway Station in Shenzhen, south China's Guangdong Province, Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Mao Siqian)

Passengers walk to get on train K4051 at Beijing Railway Station in Beijing, capital of China, on Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Ju huanzong)