Wine is used to flavor foods, and of course is often drunk when friends get together. A person can also drink by himself: "I lift my cup to invite the moon, and with the shadow, we become three," the saying goes.
好友相聚，開懷暢飲之餘，有詩曰：「酒逢知己千杯少」；一人獨酌，自得其樂，則曰：「舉杯邀明月，對影成三人」。