Ge Long Hui A P P·2026-01-07 06:02Group 1 - The brain-computer interface sector in the A-share market experienced a significant decline, with multiple companies reporting substantial drops in their stock prices [1] - Major companies such as Mailland, Chengyitong, and Aipeng Medical saw declines exceeding 10%, while others like Leidi Ke and Weisi Medical dropped over 8% [1][2] - Several brain-computer interface concept stocks issued announcements indicating a cooling off, with companies like Aerospace Changfeng stating they have not actually engaged in related business activities [1] Group 2 - Mailland's stock fell by 11.09%, with a total market value of 54.43 billion [2] - Chengyitong's stock decreased by 10.91%, with a market capitalization of 6.731 billion [2] - Aipeng Medical's stock dropped by 10.39%, with a market value of 4.514 billion [2]