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What are the benefits of doing the health therapy of purple bamboo micro-row?
There are only six holes and eight holes, but no seven holes.

Six-hole Xiao is a hole without little finger, and eight holes have that hole.

Generally, those with less income go to school with eight holes, otherwise they will not be able to squeeze the last hole when they collapse.

Zizhu Xiao means that its material is Zizhu ~.