hết lòng

kwɒntuː zɪnwɒn kwɒntuː jɪfɔː kwatuːn zɪwɒnn kwatuːn jɪfɔː həʊlhɑːtɪdli

In Chinese 全心全意 (quán xīn quán yì - wholeheartedly)

To do something with all one's heart and effort, wholeheartedly; to be completely dedicated to something.