Lu Ban has many inventions and creations. Many ancient books record that many woodworking tools used by carpenters were invented by him. Like the curved ruler used by carpenters, it is called Luban ruler. Another example is the ink fountain, umbrella, saw, plane, drill, etc. It is said that Lu Ban invented it.
The invention of these woodworking tools freed the craftsmen at that time from primitive and heavy labor, doubled their labor efficiency, and gave civil engineering a new look. It all contains original physical science knowledge.
Lu Ban is also a very clever mechanical inventor. The lock he made has a mechanism on the inside, leaving no trace on the outside. It can only be opened with the help of a well-matched key.