Do make sure any deal is done accompanied with a written agreement. Contract law has come into effect more than two decades in China, it’s recommendable to consult a lawyer before you execute an agreement. Make sure you understand each line and you include all necessary clauses into the contract. Do remember that in China, usually an agreement will be effect after it’s signed or sealed; if the other party is not a individual but a company, a seal not only a signature is needed for executing an agreement.