How will two typhoons affect each other?

Binary typhoon generally means that two tropical cyclones occur at the same time, reaching the intensity of tropical storm or above, and the center distance is less than 20 latitudes, which affects each other. On July 30th, Typhoon Shana, the 9th this year, just landed on the coast of Fujian, and Typhoon Haitang, 10, headed south for Fujian. These two typhoons once formed a strange phenomenon of "double stage dance" at sea.

Unidirectional influence type

When a generally strong tropical cyclone and a generally weak tropical cyclone approach each other, the strong tropical cyclone will dominate the path of the weak tropical cyclone and make the weak tropical cyclone rotate counterclockwise around it. For example, the impact of typhoon Tim 1994 on tropical storm Vanessa.

Interaction type

When the intensity of two tropical cyclones is equal, they will rotate around a concentric center, and they will not get rid of the mutual influence until they are influenced by other weather systems or one of them is weakened. For example, Typhoon Wayne and Typhoon Na Wei in 1986, and Typhoon Morakot and Swan in 2009.

combined type

A stronger tropical cyclone may absorb a smaller tropical cyclone and make it a part of its own circulation. It's like Maggie absorbed the low pressure area of the South China Sea at the beginning of 1999 (but only if the distance is close enough and the weak tropical cyclone is not affected by other weather systems).