The death of a four-month-old baby in central China has stoked public anger on social media as frustrations mount over Beijing’s stringent “dynamic zero Covid” policy, which has confined millions to their homes and sparked angry protests. The girl died after suffering vomiting and diarrhoea while in quarantine at a hotel in the city of Zhengzhou, according to a post by her father, Li Baoliang, on China’s Twitter-like platform Weibo on Wednesday. Li had called an emergency hotline for help after his daughter vomited repeatedly in the early hours of Monday, but when medical staff arrived and the child tested…