形影相隨

形影相随
xíngyǐngxiāngsuí
  1. lit. body and shadow follow each other (idiom)
  2. fig. inseparable

CEDICT

形容關係親密，無時無處不在一起。明．沈受先《三元記．第二八齣》：「止合躬耕畝畝，形影相隨，早晚相依。」《紅樓夢．第一○三回》：「廟名久隱，斷碣猶存。形影相隨，何須修募。」也作「形影不離」。

重編國語辭典

Entry Composition

1 形影 xíngyǐng
  1. form and shadow
  2. silhouette
2 相隨 xiāngsuí
  1. to tag along (with sb)
  2. (in combination with 與 yǔ or 和 hé) to accompany (sb)
  3. (fig.) (of one situation) to go hand in hand (with another)