Is the contract with a letter formal?

He Xin is a formal company. 1 He Xin Securities Investment Consulting Co., Ltd. was established on1July 29, 997. The legal representative is Wu Yueping, whose business scope includes: securities investment consulting, investment consulting, investment management, enterprise bankruptcy liquidation consulting, services, fund sales, enterprise management, financial consulting services, information services, enterprise development planning consulting, corporate image planning, undertaking exhibitions, organizing cultural and artistic exchanges, conference and exhibition consulting services, education consulting, internet information services, information services, data processing, computer software and hardware design, development and services. 2. Call center business and information service business (subject to business license), online media business, design, production, release and agency of various domestic advertisements (projects subject to approval according to law can only be operated after approval by relevant departments), internet cultural information service, radio and television program production and distribution, etc.