Chinese workers have been urged not to make “unnecessary” trips home for Lunar New Year for the second consecutive year, as authorities nationwide tighten Covid-19 preventive measures after confirmed infections surged in the eastern province of Zhejiang.As many as 47 – or nearly 80 per cent – of China’s 59 locally infected cases reported on Saturday were in Zhejiang province, according to the National Health Commission.The northern region of Inner Mongolia, which has been battling an outbreak…