The impact of typhoons ranges from the Vietnamese coast in Beibu Gulf to central Japan, and Liaoning and Jilin in the northeast are sometimes affected by typhoons, especially in Liaoning, where typhoons can land in Liaodong Peninsula and Liaodong Bay.

Typhoon is a kind of tropical cyclone. Tropical cyclone is a low-pressure vortex that occurs on the surface of tropical or subtropical ocean, and it is a powerful and profound "tropical weather system". In China, tropical cyclones in the South China Sea and the Northwest Pacific are divided into six grades according to the maximum average wind speed near the center of the bottom layer, and those whose wind reaches 12 or above are collectively called typhoons.

According to the statistics of the United States Navy Joint Typhoon Warning Center, the number of typhoons in the Northwest Pacific and South China Sea in 1959-2004 is related to the month, with an average of 26.5 typhoons generated each year. The month with the most typhoons is August in Gregorian calendar, followed by July and September.