Ge Long Hui A P P·2026-01-07 02:18Group 1 - The A-share market has seen a significant pullback in brain-computer interface (BCI) concept stocks, with notable declines in companies such as Mailland and Entropy Technology, which fell over 10% [1] - Several BCI concept stocks have issued announcements indicating a cooling off, with Aerospace Changfeng stating that it has not actually engaged in BCI-related business [1] - Weisi Medical mentioned that its new products in the BCI field are still in the early stages of market cultivation [1] Group 2 - Specific stock performance includes Mailland down 10.68% with a market cap of 5.468 billion, Entropy Technology down 10.13% with a market cap of 10.1 billion, and Chengyi Tong down 7.55% with a market cap of 6.985 billion [2] - Other notable declines include Leedick down 7.14%, Botao Biological down 6.37%, and Aipeng Medical down 6.38% [2] - The overall trend shows that many BCI-related stocks are experiencing a downturn, with declines ranging from 4.33% to 10.68% across various companies [2]