hǎo jiǔ chén wèng dǐ
lit. the best wine is at the bottom of the jug (idiom)
fig. the best is saved for last
好
hǎo
good
酒
jiǔ
wine (esp. rice wine)
沉
chén
variant of 沉[chen2]
瓮
wèng
variant of 甕|瓮[weng4]
底
dǐ
bottom; base