Blue alert for ocean waves: Medium to large waves will appear in the coastal waters of Shanghai, Zhejiang, and Fujian.

According to the Ministry of Natural Resources, it is expected that from the morning of December 21st to the afternoon of the 21st, due to the influence of cold air, large to giant waves of 3 to 5 meters will appear in the sea near the East China Sea, Diaoyu Islands, and the Taiwan Strait; waves of 2 to 3.3 meters will appear in the coastal waters of Shanghai, Zhejiang, and Fujian, with a wave warning level of blue in the coastal waters. The National Marine Forecasting Center issued a blue wave warning today.