阳奉阴违 (yáng fèng yīn wéi) | Meaning: outward devotion but inner opposition (idiom); to pay lip service | Chinese Idiom with Pinyin & Origin

two-faced, three knives (idiom); double-cross · double dealing and back stabbing两面三刀liǎng miàn sān dāo

duplicity · hypocrisy (idiom)口是心非kǒu shì xīn fēi

outside appearance and inner reality differ (idiom); not what it seems · saying one thing but meaning sth different表里不一biǎo lǐ bù yī

false · hypocritical · artificial · sham虚伪xū wěi

to play dumb · to slack off (idiom)打马虎眼dǎ mǎ hu yǎn

outward devotion but inner opposition (idiom); to pay lip service · to agree overtly, but oppose in secret