BEIJING, Aug. 2 -- China's national observatory on Wednesday renewed a blue alert as Typhoon Khanun, the sixth typhoon this year, is moving northwest toward the East Sea.

From 8 a.m. Wednesday to 8 a.m. Thursday, strong winds with speeds of 39 to 74 kilometers per hour are expected in the Bashi Channel, areas to the east of China's Taiwan island, most parts of the East Sea, waters near the Diaoyu Island, the Hangzhou Bay, coastal areas of Zhejiang and northern regions of Fujian, northern parts of Taiwan island and coastal areas in the south, with wind gusts surpassing 100 kilometers per hour, according to the National Meteorological Center.

The center has advised the aforementioned regions to make emergency preparations for the typhoon.

China has a four-tier, color-coded weather warning system, with red representing the most severe warning, followed by orange, yellow and blue.