Four Chinese Yixing teapots, Qing Dynasty/20th century, one teapot of compressed globular form in purple zisha clay, with a seal mark reading 'Made by Huang Yuling', accompanied by china guardian Auctions certificate. Possibly Qing Dynasty, one teapot of tall ewer form with a long curved spout in purple zisha clay, unmarked, accompanied by a china guardian Auctions certificate, a pair of teapots of globular form with conical spouts, in red clay. Mark unread, 7 cm high, 14.5 cm wide, 8 cm high, 14.5 cm wide each, 12 cm high, 13 cm wide