Shanghai on Saturday reported 12 more Covid-19 deaths and a sharp rise in local infections as residents of the financial hub found ways to evade online censorship to voice their frustration regarding the nearly month-long lockdown. The frustration of residents of Shanghai is bubbling over with the government ruling out easing restrictions until all cases have been cleared out outside quarantine zones. A six-minute video titled Voice of April, describing the lockdown experience in Shanghai, has been widely circulating on Chinese social media despite censorship. People have found creative ways to share the video, which is a collation of government…