shuǐ qiǎn yǎng bù zhù dà yú
lit. shallow waters cannot harbor big fish (idiom)
fig. ambitious, talented people cannot reach their full potential in a small organization
水
shuǐ
water
浅
qiǎn
shallow
养
yǎng
to raise (animals)
不
bù
no; not so
住
zhù
to live
大
dà
big; large; great
鱼
yú
fish (CL:條|条[tiao2],尾[wei3])