artifice

The magician relied on clever artifice and mirrors to make the large elephant disappear.

(Chinese) 魔术师依靠巧妙的诡计和镜子让大象消失了。

Her friendly smile was merely an artifice to hide her true intentions of stealing the secret.

(Chinese) 她友好的微笑仅仅是为了掩饰其窃取秘密的真实意图的手段。