[Message] How many hidden rules are behind the "rarity of tickets"? - Women like flowers

How many underlying rules are hidden behind the "extremely difficult ticket purchasing" situation? On January 10, at Wuxi Train Station in Jiangsu Province, the "returning Sichuan army" were boarding the L216/7 train bound for Chengdu. The 2009 Spring Festival travel rush is about to begin. According to predictions, this year Wuxi's Spring Festival travel season will send off 4.33 million passengers, an increase of 1.5% compared to last year's actual volume. Author: Long Minfei. It's the end of the year again, and for those working away from home, "extremely difficult ticket purchasing"...