個中人

a person in the know

used in 自個兒|自个儿[zi4 ge3 r5]

(classifier used before a noun that has no specific classifier) / (bound form) individual

therein / in this

China / Chinese / surname Zhong

within / among / in / middle / center / while (doing sth) / during / (dialect) OK / all right

to hit (the mark) / to be hit by / to suffer / to win (a prize, a lottery)

go-between / mediator / intermediary

person; people / CL:個|个[ge4],位[wei4]