bié kàn / tā / zuǐ shàng / shuō / xīn zhōng wú shù / shí jì shàng / zǎo yǐ / chéng zhú zài xiōng

别看他嘴上说心中无数，实际上早已成竹在胸。

Although he says he has no idea, he actually already has a well-thought-out plan.