How much should you give as a wedding gift to classmates and friends?

Summarizing dozens of comments: In most regions, the consensus is that you don't need to give a gift if you're not close to the couple. For acquaintances, it's fine to skip it entirely; for good friends, 500–600 RMB is typical; and for very close friends, 1,000 RMB is common, rarely exceeding that amount. (A few provinces/regions are different—where even 20 RMB is considered generous.)

Original post: https://www.v2ex.com/t/970355#reply22