Wares of the _t´u ting_, the "earthy" Ting, type, with creamy glaze, were made at Nan-fêng Hsien,[220] in the province of Kiangsi, during the Yüan dynasty; and at Chi Chou[221] in the same province there were factories in the Sung dynasty which deserve some attention. The latter were situated at Yung-ho Chên, in the Chi Chou district, in the prefecture of Chia-an Fu, and one of the productions appears to have resembled the purple (_tzŭ_) Ting ware, though it was coarser and thicker, and of no great merit. The _Ko ku yao lun_[222] speaks of five factories in this place producing white and purple (_tzŭ_) wares, flower vases of large size and considerable value, and small vases which were ornamented, and crackled wares of great beauty. The best of these potteries belonged to a man named Shu [Chinese]. We are further informed by the _Chü chai tsa chi_[223] that Shu, the old man (_Shu wêng_), was skilled in making ornamental objects, and that his daughter, _Shu chiao_ (the fair Shu), excelled him. Her incense burners and jars of various kinds commanded a price almost equal to that of Ko yao. The author proceeds to describe a dish and a bowl in his own collection as of "grey ware with invisible blue[224] glaze, which was capable of keeping water sweet for a month." It has been assumed that the decoration of the "small vases" was painted,[225] but the expression in the text (_yu hua_)[226] gives no clue to the kind of decoration, and we are left quite in the dark as to its real nature. The industry seems to have ended abruptly at the beginning of the Yüan dynasty, the story being that when the Sung minister Wên was passing by all the ware in the kilns turned to jade, and the potters, fearing that the event might reach the Emperor's ears, closed down the kilns and fled to Ching-tê Chên. The meaning of this myth has never been satisfactorily explained, but it was pointed out that a large number of Yung-ho names appear in the early lists of Ching-tê Chên potters, and the _Ko ku yao lun_ asserts that excavations on the site of the kilns were made in the Yung Lo period (1403-1424), and that several kinds of jade cups and bowls were found--cautiously adding, however, that this might or might not have been the case. The ruins of the Yung-ho potteries seem to have been still visible in the fifteenth century.[227]