According to the meteorological center, Lekima will bring heavy rains to areas including provinces of Anhui, Fujian, Jiangsu and Zhejiang, the municipality of Shanghai as well as Taiwan region.
Provinces including Zhejiang and Jiangsu have given out emergency response alerts.
Also a nation-wide yellow alert for rainstorms has been issued by China's national weather observatory as heavy rains will sweep most parts of China from Friday to Saturday morning.
China has a four-tier color-coded weather warning system, with red the most severe, followed by orange, yellow and blue.
(With input from Xinhua News Agency)