M Stanley has issued investment ratings for various China biotech stocks, with 'Overweight' ratings for KEYMED BIO-B, INNOVENT BIO, DUALITYBIO-B, ABBISKO-B, ZAI LAB, and VISEN PHARMA-B, indicating a positive outlook. HUTCHMED was downgraded from 'Underweight' to 'Equalweight', suggesting a more neutral stance. LEADS BIOLABS-B and REMEGEN received 'Equalweight' ratings, reflecting a balanced view on their performance.