What if your dog could tell you why it's sad? A Hangzhou startup now translates barks and meows with 94.6% accuracy. Another wraps pets in a feather-light ECG jacket that watches their heart for five days. Iris ID means no lost pet ever stays lost. With eight local innovators racing to extend pet lives by five years, Hangzhou isn't just making tech – it's rewriting the bond between humans and their best friends.