Didwana is the city, nearby of Nagaur city in Nagaur district of Rajasthan, India. The lion gateway of Marwar in Rajasthan and the archway of Merta, known as Abhanagri and Upakashi, is situated on the northern side of Didwana Salt lake in the north-eastern direction of Nagaur district. It is currently the additional district headquarters of Nagaur district, 6 tehsils of East Nagaur are Didwana, Ladnun, Kuchaman, Nawa, Makrana and Parbatsar. The people of Didwana speak the Rajasthani language of Marwadi, a language in the Indo-Aryan family similar to Hindi. City of Blood Donation Dr.Sohan Choudhary: - The credit for bringing revolution of blood donation in Didwana goes to revolutionary blood hero Dr. Sohan Choudhary. Till date, Dr. Sohan Chaudhary has organised more than 400 blood donation camps. In the surrounding area and in the blood banks of the area, he has his own distinct identity. keep an image Didwana ranks first in Rajasthan in terms of blood donation. There is so much enthusiasm about blood donation here that people celebrate their family's birthday or death by donating blood. Since 2001, an average of 10 blood donation camps have been organised in Didwana every year on an average, with an average of 3000 units of blood donation. Since 2001,approx 150000 units of blood donated in per year In September 2017, in 2 blood donation camps held in a span of 15 days, 1353 and 1567 units of blood were collected respectively, which is a record. Earlier, 1051 blood donation was given in April 2017, 1262 in September 2016, 922 in August 2016 and 511 units in January 2013. In view of the enthusiasm of blood donation, after a lot of efforts, a 300-unit capacity blood bank was established in February 2019 at the Government Bangur Hospital. The capacity of which was increased due to the blood donation. Since February 2019, 1825 units of blood have been donated to this blood bank, which is a record. History There is no compiled history of Didwana, but the excavation done here has shown that this is a lower Paleolithic culture site so the activities of one of the earliest ancestors of mankind have taken place here. Two sandy mounds 700 meters wide and 300 meters wide have been witness to human development in the flow of Bangal Canal near the city. Geophysicist Prof. V.N. of Deccan College, Pune. Mishra and SN Rajguru excavated