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There are many understandings of this. What you presented is one, for sure.
That is a way for the energy to leave your body.

It is not the only way to generate it. Meditation, Energy practices like thai chi, qi gong etc will enhance it.

Raising it throughout the moon cycle is also important. Abstinence from "finishing."

ahem...

soooo

In chinese medicine there are at least 3 defined types of Chi (prana, orgone, etc.).

This is one that is usually depleted quite early and does not naturally re charge from eating and such.

There is a constant connection that derives its energy from this particular type of Chi - that growth of the body taps into.

Some gather it through prana exercises.

Key is all chakras open, balanced and receiving.