During the Chinese New Year, in Southern China, red envelopes are typically given by the married to the unmarried, most of whom are children. In northern and southern China, red envelopes are typically given by the elders to the younger under 25 (30 in most of the three northeastern provinces), regardless of marital status. The amount of money is usually notes to avoid heavy coins and to make it difficult to judge the amount inside before opening. It is traditional to put brand new notes inside red envelopes and also to avoid opening the envelopes in front of the relatives out of courtesy. However, to get the money, the younger generation needs to kowtow to thank their elders.