In China, December 25 is not a legal holiday. The one percent of Chinese citizens who consider themselves Christians unofficially, and usually privately, observe Christmas.

Many other individuals celebrate Christmas-like festivities even though they do not consider themselves Christians. Many customs, including sending cards, exchanging gifts, and hanging stockings are very similar to Western celebrations.

Both Hong Kong and Macau designate Christmas as a public holiday on December 25. Both are former colonies of Western powers with (nominal) Christian cultural heritage.

However, it is worthy of note that commercial Christmas decorations, signs, and other symbolic items have become increasingly prevalent during the month of December in large urban centers of mainland China, reflecting a cultural interest in this Western phenomenon, and, sometimes, as part of retail marketing schemes.

Source: Wikipedia