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Essence gate
精关 〔精關〕 jīng guān
The barrier that regulates the discharge of semen. The Chinese term jīng means essence and its physical manifestation, semen. The essence gate
is not clearly defined as an anatomical structure. Zhāng Jiè-Bīn (Míng, 1563–1640) described a gate that is felt to open on ejaculation,
which is now often called the essence gate. Signs such as seminal efflux, seminal emission, and premature ejaculation are attributed to insecurity of the essence gate
due to kidney disease. See life gate.