In the opening scene of The Farewell, taking place in a local hospital in China, the winsome and irrepressible grandmother, Nai Nai, has a complete physical, but has no idea of what it portends. Her sister and doctor tell Nai Nai everything is fine,  she need not worry.  She has stage 4 lung cancer. Determined to spare Nai Nai bad news, her adult children, under the pretext of planning a wedding for one of the grandsons, gather the family for what is to be presented as a family reunion.  The granddaughter, Billi,  a young millennial living in New York City (played by...