Andrew Liu’s extended family chatted excitedly with his auntie, Li Tang, in Taiwan. Despite the early morning hour — it was 3 a.m. in Taiwan — Tang’s face beamed on the small phone’s screen as the family narrated Liu’s commencement ceremony from the Hackensack Meridian School of Medicine. Liu, whose brother, Patrick, said he will practice pediatric neurology, was one of 63 students who officially became medical doctors last week in a ceremony at the New Jersey Performing Arts Center. This diverse group of medical students — who speak 32 languages among them — will be well-prepared for their im…