NEW YORK—On Liu Danbi’s 31st birthday in December—the first that passed without a birthday wish from her mother—she did not cry. She said her tears had run out long ago. Liu had not seen her mother face-to-face since they parted at the airport in China seven years ago, before she boarded the flight for New…

NEW YORK—On Liu Danbi’s 31st birthday in December—the first that passed without a birthday wish from her mother—she did not cry. She said her tears had run out long ago. Liu had not seen her mother face-to-face since they parted at the airport in China seven years ago, before she boarded the flight for New…

NEW YORK—On Liu Danbi’s 31st birthday in December—the first that passed without a birthday wish from her mother—she did not cry. She said her tears had run out long ago. Liu had not seen her mother face-to-face since they parted at the airport in China seven years ago, before she boarded the flight for New…

NEW YORK—On Liu Danbi’s 31st birthday in December—the first that passed without a birthday wish from her mother—she did not cry. She said her tears had run out long ago. Liu had not seen her mother face-to-face since they parted at the airport in China seven years ago, before she boarded the flight for New…