巧言令色

qiǎoyánlìngsè
to be glib in one's speech and wear an ingratiating expression (idiom)

CEDICT

with flourishing words and friendly countenance; with insincere courtesy

Wiktionary

话说得很动听，脸色装得很和善，可是一点也不诚恳。

重編國語辭典

指话说得很动听，脸色装得很和善，可是一点也不诚恳，显得矫情虚伪

維基詞典

Examples

巧言令色，鲜矣仁。

Fine words and an insinuating appearance are seldom associated with true virtue.

Source: Tatoeba

Entry Composition

1 巧言 qiǎoyán clever but deceptive talk
2 令色 lìngsè
  1. (literary) beautiful appearance
  2. (literary) kind look
  3. (literary) sycophantic expression
  4. beautiful appearance
  5. kind look
  6. sycophantic expression