Yaozhou ware
... that around 1100, Yaozhou ware was accepted by the Chinese Imperial court, but several decades later it was described by a poet as "extremely coarse and used only by restaurants"?
... that around 1100, <b id="mwhw"><a href="./Yaozhou_ware" id="mwiA" rel="mw:WikiLink" title="Yaozhou ware">Yaozhou ware</a></b> was accepted by the Chinese Imperial court, but several decades later it was described by <a href="./Lu_You" id="mwiQ" rel="mw:WikiLink" title="Lu You">a poet</a> as "extremely coarse and used only by restaurants"?