It seems that she injured herself or something?
From alan Studio's Weibo, posted today: "It's obviously painful for alan to stand up. Either the doctor let her out or she sneaked out of the hospital to record."
She still has her hospital bracelet on her wrist:
alan has uploaded pics of this recording on her official Weibo but her wrist with the hospital bracelet does not appear, and she did not mention anything about an injury/sickness or an hospitalization.