简答题TheTri-color glazed Porcelain was based on and as an improvement of the lead-glazed porcelain of the Qin Dynasty.It had bodies made of white pottery clay and covered in a low-temperature glaze that contained lead.简答题The earliest Tang Tri-Color were most unearthed in _______. A、Luoyang B、Tangshan C、Jingdezhen D、Dawenkou