I want to buy a serviced apartment but it turns into an office. Can I cancel the contract?

Typing is too troublesome, so I will give you an opinion directly: Article 54 of the "Contract Law" of the following contracts, one party has the right to request the people's court or arbitration institution to change or cancel:

(1) The contract was concluded due to a major misunderstanding;

(2) The contract was obviously unfair when it was concluded.

If one party uses fraud, coercion or takes advantage of someone else's danger to cause the other party to enter into a contract against its true intention

the injured party has the right to request the people's court or arbitration institution to change or Undo.

If a party requests a change, the people's court or arbitration institution shall not revoke it.