The Inn of the Sixth Happiness(1958)

All her life, Englishwoman Gladys Aylward knew that China was where she belonged. Unqualified to be sent as a missionary, Gladys works as a domestic to earn to send herself to a poor, remote village. There, she eventually lives a full and happy life: running the inn, acting as 'foot inspector', advising the local Mandarin, and even winning the heart of mixed-race Captain Lin Nan. Gladys discovers her real destiny when the country is invaded by Japan and the Chinese children need her to save their lives.