Correct
牛劲
/ niú jìn /
Strokes
Example
As a Noun
great strength; tremendous effort
1
Zhè
这
jiàn
件
shì
事
kě
可
ràng
让
wǒ
我
fèi
费
le
了
niú
牛
jìn
劲
le
了
。
I spent a lot of time and efforts on this. / I went to a lot of trouble for this.
As a Noun
obstinacy; stubbornness; tenacity
2
Tā
他
yòu
又
fàn
犯
niú
牛
jìn
劲
le
了
。
He is being obstinate again.