Everyone on my WeChat Moments is posting about the traffic jams on their way back home, while I'm still relaxing overseas.

As the Spring Festival holiday enters its second half, the atmosphere on social media in China is changing. A few days ago it was all about sharing photos of New Year's Eve dinners, the Spring Festival Gala, and New Year's greetings; now it's all about highway traffic jams, crowded train stations, and "navigation says another 8 hours"—the peak of the Spring Festival travel rush has arrived. For overseas students and Chinese, this scene is just…