-In this paper the structure of the East Asian summer monsoon regime is unraveled through investigation of the activity of the summer monsoon of China in connection with the circulation systems of low latitudes. It is shown that the components of the summer monsoon regime of East Asia are the Tibetan high. Northwest Pacific high, Mascarene high, Australian high, India-South China Sea depression and the therefrom derived tropical convergence zone and associated ascending clouds over the South China Sea and Mei-Yu fronts and associated ascending clouds over China. It is more complicated than the structure of the Indian summer monsoon regime. The East Asian summer monsoon mainly consists of the trade curreuts from the tropical region of the North Pacific Ocean and the Somalian cross-equatorial currents from the Indian Ocean. In the entire monsoon regime the key components should be the Northwest Pacific high and the Mascarene high, and they have a great influence on the Mei-yu Period’s Precipitation in the -In this paper the structure of the East Asian summer monsoon regime is unraveled through investigation of the activity of the summer monsoon of China in connection with the circulation of of low latitudes. It is shown that the components of the summer monsoon regime of East Asia are the Tibetan high. Northwest Pacific high, Mascarene high, Australian high, India-South China Sea depression and the derived derived tropical convergence zone and associated ascending clouds over the South China Sea and Mei-Yu fronts and associated ascending clouds over China. It is more complicated than the structure of the Indian summer monsoon regime. The East Asian summer monsoon mainly consists of the trade curreuts from the tropical region of the North Pacific Ocean and the Somalian cross-equatorial currents from the Indian Ocean. In the entire monsoon regime the key components should be the Northwest Pacific high and the Mascarene high, and they have a great influence on the Mei-yu Period’s Pr ecipitation in the