CP means pairing. WULI is mine. Pronunciation in Korea. OTZ=ORZ prostrated. It used to refer to the popular emoji on the Internet: _|||○ It looks like a person kneeling on the ground, with his head down, and a gesture of "God, why are you doing this to me". Although simple, it is very vivid. No one named this symbol in the early days, and the name "lose your mind and bend forward" appeared later. It is said that these five words are embroidered on the cushion of a restaurant. As for who thought of them before, the truth has not yet been clarified. PD is still unclear, hehe.