Is there a seal on the sales contract of Wuxi stock house?

According to the relevant public information, if there is no special agreement on the effective time or conditions in the contract, the contract will take effect when signed and sealed by both parties. A contract is an agreement between civil subjects to establish, change and terminate a civil legal relationship. Article 464 of the Civil Code of People's Republic of China (PRC): Marriage, adoption, guardianship and other identity relations shall be governed by laws and regulations; If there are no provisions, the provisions of Part III can be applied by reference according to its nature.