Due to the development of the Great Silk Road and joining with Poykent fortress have been founded first and second sites of ancient settlement.
According to Chinese chronicles, this city was under the "An" (安, Bukhara) kingdom and was the centre of the "Bi" (毕) khanate.
The scientists of Institute of Archaeology of the Academy of Sciences of the Republic of Uzbekistan have carried out scientific research in the ruins of the city for a long time.
As a result, Zoroastrian temples, a palace, and a mosque, built in the 9th century, and remnants of a tower were found in citadel.
According to the researcher, due to the inaccessibility of the lower flaw of Zarafshon River, the city ceased to exist in the middle of the 9th century.