Jeho

or Liao Hsi, highlands in northeastern China, in Liaoning and Hopeh provinces and in the autonomous region of Inner Mongolia, with an area of approximately 120,000 sq km. The predominant heights range from 500 to 1 ,300 m in the northwest and from 1,000 to 1,600 m in the southeast, with a maximum elevation of 2,050 m at Mt. Ulunchan. The north-western part of the Jeho highlands is a system of separate mountain massifs and undulating plateaus. There are rocky mountains in the southeast. The foothills are deeply divided into valleys of the Luanho and Liaoho river basins. The high-lands are formed of Precambrian crystallized schist, gneiss, and granite, and also of Mesozoic effusive and sedimentary rocks (sandstone, limestone, and basalt). Coal is mined in the area, and there are hot mineral springs in the Jeho river (a left tributary of the Luanho) valley. Steppe vegetation predominates. In places along the slopes, there are thickets of bushes of hazel, oak, and juniper, and there are groves of oak, maple, and nut trees. The valleys are thickly settled and cultivated, with orchards and with fields of green bristle grass (Setaria viridis) and kaoliang. [9.752–5]