Correct
唱空城计
/ chàng kōngchéngjì /
Strokes
Definition
lit. to sing “The Empty City Stratagem” (idiom)/fig. to put up a bluff to conceal one's weakness/(jocularly) (of a place etc) to be empty/(of one's stomach) to be rumbling
Example
Definition
perform the Stratagem of the Empty City—present a powerful front to conceal a weak defence; assume a bold exterior to veil a weak interior; have an absentee staff