Lakes in the Qinghai-Tibet Plateau are relatively concentrated, mostly inland saltwater lakes. Not that there are many lakes in the south.
Lakes in China (such as lakes along the Yangtze River in Hubei), lagoons, such as the West Lake, lakes formed by limestone dissolution in Yunnan-Guizhou Plateau, Poyang Lake, Dongting Lake, Dianchi Lake, dammed lake and Jingbo Lake, etc. It's just that these famous lakes are not around you!