Investment Rating - The industry investment rating is "Positive" (maintained) [1] Core Insights - The report highlights recent positive developments in the high-quality weight loss sector, particularly focusing on myostatin pathway clinical trial results from Regeneron and Scholar Rock, which demonstrate significant reductions in lean body mass loss when combined with GLP-1 medications [4][12] - The pharmaceutical and biotechnology sector experienced a decline of 4.35% in the third week of June 2025, underperforming the CSI 300 index by 3.9 percentage points, ranking 29th among 31 sub-industries [5][16] - The report emphasizes the potential of Activin receptor drugs, such as Eli Lilly's Bimagrumab and Lai Kai's LAE-102, to retain lean body mass and even promote muscle gain, with promising safety and pharmacokinetic data [4][12] Summary by Sections 1. Recent Developments in Weight Loss Sector - Regeneron's myostatin antibody Trevogrumab combined with semaglutide showed a 50.8% reduction in lean body mass loss over 24 weeks, compared to a 7.9 lbs loss with semaglutide alone [4][12] - Scholar Rock's myostatin antibody Apitegromab combined with Tirzepatide demonstrated a 54.9% reduction in lean body mass loss [4][12] 2. Market Performance - The pharmaceutical and biotechnology sector's decline of 4.35% in June's third week was the largest among all sectors, with the vaccine sector experiencing the smallest drop of 0.4% [5][21] - Other sub-sectors, such as blood products and medical consumables, also faced declines, with the largest drop seen in other biological products at 6.7% [5][21] 3. Recommended Stocks - Recommended stocks include major pharmaceutical and biotechnology companies such as Heng Rui Medicine, East China Medicine, and Innovent Biologics, among others [6]