Province No. 1 covers an area of . It is located at easternmost part of Nepal bordering by Tibet Autonomous Region of China in north Bagmati Pradesh in west, Province No. 2 in south-west, Bihar of India in south, North Bengal of India in south-east and Sikkim of India in north-east. Sikkim and part of North Bengal of India forms ethno-linguistic relation with Nepal. Geography of Province No. 1 in eastern Nepal is very diverse, of highest peaks of Himalayas in northern extremes to terai region to south. It lies between 86 degree 1 minute and 88 degree 3 minutes east longitude and 28 degree 2 minutes and 26 degree 3 minutes north longitude. Biratnagar, the industrial capital of Nepal, is the temporary capital of this province.