马云夜骑西湖被网友偶遇，同款自行车卖1.85万元

Core Viewpoint - The article highlights a recent encounter with Jack Ma, the co-founder of Alibaba, who was spotted cycling by West Lake, sparking nostalgia among netizens about his past activities and contributions to the community [1][4]. Group 1: Jack Ma's Recent Appearance - A video surfaced showing Jack Ma cycling at West Lake, where he greeted a fan and commented on the pleasant weather [1]. - Netizens reminisced about Jack Ma's past, including an incident where he helped catch a thief and his days as a free tour guide [4]. Group 2: BROMPTON Bicycle - The bicycle Jack Ma was riding is a BROMPTON, which is priced at approximately 18,500 RMB (1.85 million) [4]. - BROMPTON's associated company, 伯龙腾商贸（上海）有限公司, was established in June 2012 with a registered capital of 2.5 million RMB [7]. - The company operates in the retail sector, focusing on bicycles and related accessories, and has three branches currently in operation [7][9].