跨境通：全资子公司成立了优骋电子商务（海南）有限公司，享受海南自贸港相关优惠政策

Group 1 - The core viewpoint of the article is that the company has established a business presence in Hainan, benefiting from the preferential policies of the Hainan Free Trade Port [1] - The company’s wholly-owned subsidiary, Shanghai Youyi, established Youcheng E-commerce (Hainan) Co., Ltd. in June 2021 [1]