1. Pfizer and YaoPharma sign $2.1 billion deal for obesity treatment. 2. The drug YP05002 targets GLP-1 for obesity management. 3. This partnership boosts Pfizer's presence in the obesity treatment market. 4. YP05002 competes with Wegovy by Novo Nordisk, highlighting market significance. 5. Successful development could enhance Pfizer's revenue streams significantly.