mō zhe shí tou guò hé

ㄇㄛㄓㄜ˙ ㄕˊ ㄊㄡ˙ ㄍㄨㄛˋ ㄏㄜˊ

Phr

1to advance cautiously, step by step

2to feel one's way forward

3to wade across the river, feeling for footholds as one goes (idiom)