What are the traditional three lines?

The traditional three lines are: carpentry, carpentry and carpentry.

Woodworking is a craft, a unique technology and one of the three traditional industries in China.

Brief introduction to woodworking history:

Woodworking has a long history, because it was regarded as an inferior occupation at that time, so the nobles would not learn woodworking. However, there are exceptions. For example, Zhu Youxiao, Emperor Xizong in the late Ming Dynasty, was called the "carpenter emperor" because he liked carpentry.

In Hong Kong, most middle schools have courses in carpentry or metalworking in junior high schools, and some industrial schools have courses in carpentry in high school and middle school exams. Woodworking is widely spread in Europe and America. Unlike China, Europeans and Americans regard carpentry as a job that both the upper class and the lower class can do. Woodworking is a course in many private schools in Europe and America.

In today's society, "woodworking" has a wide range of professional applications. For example, in the field of housing construction, shipbuilding, landscaping construction, and the most common decoration field.

Woodworking is a very important handicraft industry in ancient society. It is indispensable for manufacturing vehicles such as cars and boats, agricultural handicraft production tools, building houses, houses and household appliances.