海南高速：公司全资子公司海南高速数字传媒有限公司是巨量引擎官方认证的本地推综合代理商

Group 1 - The core viewpoint of the article is that Hainan Highway (000886) has established its subsidiary, Hainan Highway Digital Media Co., Ltd., as an official local promotion comprehensive agent certified by Douyin's parent company, ByteDance [1] - The company leverages the platform resources of Douyin to develop local life service businesses, providing clients with precise and efficient digital marketing services [1]