As the Spring Festival draws near, China has entered Chunyun, the world's largest annual human migration. A record 9.5 billion passenger trips are expected to take place over the 40-day travel period, with self-driving journeys accounting for around 80 percent of the total. Despite long distances and packed schedules, hundreds of millions of people make the journey home to reunite with their families. This mass homecoming, driven by the enduring importance of reunion, remains China's most cheris