周杰伦入驻抖音，概念股一度大涨100%

Core Viewpoint - Jay Chou's entry into Douyin has generated significant attention and led to a substantial increase in the stock price of his associated company, Superstar Legend, indicating a strong market reaction to celebrity endorsements and partnerships [1]. Group 1: Jay Chou's Douyin Entry - Jay Chou officially joined Douyin on July 9, with the account name "周同學" and verified as a singer [1]. - Within 90 minutes of joining, Jay Chou's Douyin account gained over 1 million followers, surpassing 3 million by the time of reporting [1]. Group 2: Superstar Legend's Stock Performance - Superstar Legend's stock price surged, with an increase of over 100% at one point, and remained up over 80%, reaching a market capitalization exceeding 10 billion HKD [1]. - The founders of Superstar Legend include Ma Xinting, Yang Junrong, and Ye Huimei, with Ma being a long-time business partner of Jay Chou [1]. Group 3: Business Operations of Superstar Legend - Superstar Legend's revenue primarily comes from new retail, IP creation, and operation businesses, including sales of products like Magic Coffee and skincare items [1]. - The company has invested in Jay Chou's concert and will also participate in the concert's operations, including selling Jay Chou-themed merchandise and planning related activities [1].