Group 1 - The core viewpoint of the news highlights a strong performance in the medical device sector, particularly with the medical device ETF (159883) showing significant gains and attracting substantial capital inflow [1][4] - The medical device index (H30217) rose by 1.81%, with notable individual stock performances such as Kewei Medical (301087) increasing over 17% and Shuoshi Bio (688399) rising over 12% [1][3] - The medical device ETF has seen a net inflow of 9.32 billion yuan over the past three days, with a peak single-day inflow of 517 million yuan, indicating strong investor interest [1][4] Group 2 - Kewei Medical has made strategic investments in the brain-computer interface sector, including a 5.83% stake in Nulingke Medical, which focuses on implantable brain-computer interface technology [3][4] - The domestic brain-computer interface sector is experiencing significant growth, with a recent unicorn company completing approximately 2 billion yuan in financing, marking it as the second-largest financing in the field globally [4] - The medical device ETF (159883) is the largest in the market, with over 23% exposure to brain-computer interface stocks, and is expected to benefit from domestic innovation and technological advancements [4][5]