YIH and HGH are approximately 534 miles apart by great-circle distance.
Yes. Roame's current schedule feed shows nonstop service from YIH to HGH.
Airlines represented in the current schedule are Beijing Capital Airlines (JD).
Aircraft listed in the current schedule include Airbus A320 (320), Airbus A321 (321), Airbus A321neo (32Q), 3S2 and 3SY.