Correct
勤王
/ qín wáng /
Strokes
Definition
to serve the king diligently/to save the country in times of danger/to send troops to rescue the king
Example
As a Verb
come to the rescue of the king
1
Fābīng
发兵
qínwáng
勤王
send troops to save the throne/king
As a Verb
do one's best to serve the throne