I had to look up the Chinese city tier system. What do you mean?The Chinese city tier system (Chinese: 中国城市等级制) is a hierarchical classification of Chinese cities. There are no such official lists in China, as the Chinese government does not publish or recognize an official definition or a list of cities included in the tier system. However, it is frequently referred to by various media publications for purposes including commerce, transportation, tourism, education, and more.[1][2] Given the rapid development of Chinese cities and the ever-changing dynamic among cities, the tier system has gained wide popularity in recent years as a point of reference. Cities in different tiers reflect differences in consumer behavior, income level, population size, consumer sophistication, infrastructure, talent pool, and business opportunity.[3] The tier system typically includes cities in mainland China only.
And if Yan can't do it, they're counting on you, by the way - especially if you live on the West Coast of North America.