Wuhan pensioner Zhong Hanneng endured every parent’s worst nightmare when coronavirus claimed her son in February, and – alongside other bereaved relatives – she wants to sue the local government she blames for his death.But they have had their lawsuits abruptly rejected, dozens of others face pressure from authorities not to file, and lawyers are being warned against helping them, according to people involved in the effort.The families accuse the Wuhan and Hubei provincial governments of…