'if insincere', 'do not disturb') is a 2008 Chinese romantic comedy drama film written and directed by Feng Xiaogang and starring Ge You and Shu Qi.

After selling an "innovative invention" to a high-profile (but foolish) angel investor, Qin becomes a multimillionaire and with his new fortune, he decides to put an end to his bachelor life, advertising online for potential marriage partners, to apply "if you are the one", that is, only if they are sincere.

He encounters various candidates, from a homosexual former workmate, a cemetery saleswoman with a thick southern-Chinese accent, a pathological amnesiac, an ethnic minority pecking hen, an asexual widow, an expectant single mother, and a stock-holding trader.

If You Are the One, a diverting urban lark about an unlikely couple coming together through blind dates, sports an affable cast and untaxing plot, harking back to the airy playfulness of his 1998 hit Be There or Be Square.

"[1] Perry Lam of Muse Magazine praised 'the unreserved energy Feng devotes to delivering us the predictable, coupled with the unembarrassed pleasure we take in enjoying the obvious.