tóu jī
to speculate (on financial markets)
opportunistic
congenial
agreeable
tóu jī qǔ qiǎo
to seize every opportunity
to be full of tricks
tóu jī dǎo bǎ
speculation and profiteering (idiom); buying and selling on speculation
tóu jī mǎi mài
buying and selling on speculation
huà bù tóu jī bàn jù duō
when words get sour, adding words is useless (idiom)