空谈快意

Explanation: Fiat: to make the heart feel happy. Lip service to talk, not action, just to oral gratification. 　　Source: Mao Zedong's "On Protracted War", or just talk about pleasure, not ready to actually do it. " 　　Examples: Or just ~, not prepared to actually do it. (Mao Zedong, "On Protracted War")