小心地滑

xiǎoxīndìhuá
(used on signs) caution – wet floor (lit. "be careful, the floor is slippery")

CEDICT

caution - slippery when wet

Wiktionary

Entry Composition

1 小心 xiǎoxīn
  1. to be careful
  2. to take care
2 地滑 dìhuá landslide