But aside from one rather obscure reference in the Adversus Gentes by Arnobius (303) to "the Chinese as among those united in the faith of Christ, there is little or no evidence of Christians in China before the 7th century. But from then on the evidence of Christianity in China during the T'ang Era (618-906) are numerous, including references in Chinese writings, imperial edicts, and in particular the famous inscriptions on the so-called "Nestorian Monument". During the Tلng period conditions were favorable for the introduction of foreign faiths: the lines of international communication were wide open; foreign trade flourished; the government was tolerant toward all faiths; all foreigners were welcome in various capacities.