static LocalDateTime calculateArrivalAtNY(LocalDateTime bj, int h, int m) {
    LocalDateTime ny = bj.atZone(ZoneId.of("Asia/Shanghai"))
            .plusHours(h)
            .plusMinutes(m)
            .withZoneSameInstant(ZoneId.of("America/New_York"))
            .toLocalDateTime();
    return ny;
}