We saw some new small clusters in northern China (Jilin, Heilongjiang and Liaoning), and the alert level in Shulan,
a city near Jinlin city in Jilin province, has been raised to high in less than one day on May 10th. Hope this is not the start of a 2nd wave in northern China. https://twitter.com/MackayIM/status/1259678082090201089

Source: https://c.m.163.com/news/a/FC9BPLTF051482MP.html?spss=epidemic
And (alert level raised to high in Shulan, Jilin Health Commission): http://wsjkw.jl.gov.cn/xwzx/xwfb/202005/t20200510_7205375.html