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 York City, where she would begin her graduate studies at the University at Buffalo. When they parted, for seemingly no reason, Liu was seized by a sudden grief and dissolved into tears. “I had a hunch that it was the final farewell to my mother,” she told The Epoch Times. Her mother, Huang Shiqun, died on April 23 last year after swallowing seven bottles of pills prescribed by a psychiatric hospital. Her body was discovered in a hidden stairwell of the apartment building where she lived with her husband. Huang’s last note was to her …