The Tong Shu (almanac) is a Chinese divination guide and almanac. It consists primarily of a calendar based on the Chinese lunar year. Most of the contents of the book deals with what is suitable to do on each day. Some Chinese families still follow these days for wedding ceremonies, funerals, etc.

The Tung Shing originated from the Wong Lik.

Most of the contents of the book deals with what is suitable to do on each day. Some Chinese families still follow these days for wedding ceremonies, funerals, etc. The most common use of the Tung Shing is in choosing a wedding date. The Tung Shing contains information on the auspicious and inauspicious days for weddings and/or engagements. In addition, it provides the auspicous timing in which to carry out such activities. The Tung Shing also provide a conversion of years and date between the lunar year and the common year. In more detailed versions, the calendar will list eclipses (both solar and lunar), the start of each season, and days when it will be cold or hot. It also teaches ethics and values through stories.