Classical furniture of the Ming and Qing Dynasty are
very scientific in structure. They do not use nail or glue,
and are not affected by moist or dry natural condition.
Reinforced structure known as “thread-rolling die plate
or lead screw” is embedded between parts that have
a relatively long distance between each other, simple
but effective. After hundreds of years, they are still as
firm as were built long time ago. The reason why Ming
Dynasty furniture has a high reputation is because the
design of their structure shows a perfect combination
between arts and science.