What hotel is near and economical to Tehran Convention and Exhibition Center in Iran?

You can usually find an Iranian business hotel, and the breakfast is about 40-60 dollars! Good and safe environment! Taking a taxi to the convention and exhibition center is generally around 15W Tuman (less than RMB in 30 yuan)! Another option is to stay in China Hotel, the price is 50-80 USD, and there is generally no separate bathroom in the environment, but the only taxi fare for ordering three meals of Chinese food (although the food is a little poor) is almost 15W.