Now that the hotel is online, can you check the information of other guests?

Of course.

Article 2 of the Tort Liability Law of People's Republic of China (PRC): If the scope of protection infringes upon civil rights and interests, it shall bear tort liability in accordance with this Law. The civil rights and interests mentioned in this Law include personal rights and property rights such as the right to life, health, name, reputation, honor, portrait, privacy, marital autonomy, guardianship, ownership, usufructuary right, security right, copyright, patent right, trademark exclusive right, discovery right, stock right and inheritance right.

Article 3 The infringed party has the right to request the infringer to bear the tort liability. Hotels must establish the following safety management systems: accommodation registration system. Passengers must check in. The hotel should designate a special person to be responsible for registration.