Hungry Chinese residents are begging for food on social media as the world’s strictest lowdown rules prohibit them from leaving their homes. It comes as [Strict blockade](//www.thesun.co.uk/news/17159552/chinese-residents-xian-starving-zero-covid-lockdown/) It was imposed on Xi’An earlier this week to combat the surge in the Covid case. On Monday, authorities announced that 13 million residents of the city could only leave the house if they were invited to participate in a new Mass round. [COVID](//www.thesun.co.uk/topic/coronavirus/) For testing or medical emergencies. Previously, members of each household were allowed to go out and buy food once every two days. It comes as a string of [Very…