Gyre Therapeutics, Inc., formerly Catalyst Biosciences, Inc., is a biotechnology company. The Company is focused on organ fibrosis and inflammatory diseases. The Company is primarily focused on the development and commercialization of Hydronidone (F351) for the treatment of Metabolic Dysfunction Associated Steatohepatitis (MASH-associated liver fibrosis (MASH fibrosis). The Company is also advancing a diverse pipeline in China through a controlling interest in Beijing Continent, including pirfenidone, F573, F528, and F230. Pirfenidone is used for idiopathic pulmonary fibrosis and is undergoing Phase 3 trials in dermatomyositis interstitial lung disease, systemic sclerosis-associated interstitial lung disease, and pneumoconiosis, along with a Phase 1 trial in diabetic kidney disease. F573 is being investigated for acute-on-chronic liver failure, while F528 and F230 are being evaluated for chronic obstructive pulmonary disease and pulmonary arterial hypertension, respectively.