As a non-chinese, you could ask the security staff for entry because scanning QR code to book a visit doesn't work for foreigners. I was surprised that the Chinese government took a lot of effort for this museum because the whole building is designed and built just for this particular exhibition. The whole exhibition doesn't show gruesome pictures or is scary as many might think. Instead, it is very eye opening by giving you a fuller picture and different angles of what this is all about, not just one side. However, as a lot of evidences related with the experiment were destroyed by Japanese Imperial Army or given to the Americans to grant amnesty for those involved, there are a lot of testimony content by the staff when the unit 731 was operational, which could or couldn't be fact checked. If you like anything related with WW 2, this museum is a must visit. Definitely there is no such museum in Japan but countries like Korea, China or Singapore who experienced atrocities from Japan during the war.