yī xīn
wholeheartedly
heart and soul
yī xīn yī yì
concentrating one's thoughts and efforts
single-minded
bent on
intently
wàn zhòng yī xīn
millions of people all of one mind (idiom); the people united
yī xīn yī dé
of one heart and one mind (idiom)
yī xīn èr yòng
to do two things at once (idiom)
to multitask
to divide one's attention