The validity period of futures suitability evaluation shall be stipulated by law. A futures company shall formulate corresponding business restrictions and trading rules according to relevant public information, customers' risk tolerance and trading characteristics, so as to protect customers' interests and prevent risks. Customer risk tolerance assessment is valid for one year, and should be reassessed after the expiration. According to Article 33 of the Regulations on the Administration of Futures Trading, before opening a futures account, a futures company shall assess the risk tolerance of its customers and inform them of the results of the risk tolerance assessment.