What is the age of Jun Hong myna Batty in Qing Dynasty?

Kiln-changed red glaze is a new variety bred by imitating the rose-purple glaze spots in Song Jun kiln during Yongzheng period of Qing Dynasty. When porcelain is fired in a kiln, because the kiln contains a variety of coloring elements, after oxidation or reduction, the glaze shows the colors of various metal oxides. However, the kiln change was mainly caused by the coloring of copper oxide, and the glaze was colorful after coming out of the kiln, showing unexpected effects. This effect comes from accident, because of its special color, I don't know its principle, but it is fired in a kiln, so it has been called "kiln change" since ancient times. Before the Qing Dynasty, the kiln red glaze porcelain seen in Jingdezhen appeared by accident, and the occasionally fired kiln red glaze did not become a fixed variety, which was related to the fact that people thought kiln red glaze porcelain was a "freak" at that time. The appearance of kiln red glaze porcelain predicted that it would be unlucky to destroy it. The identification of kiln-changed red glazed porcelain is not irregular. According to the characteristics of utensils and the background of the times, Master Mo Zhai roughly summarized the evolution of the kiln-to-red glazed porcelain in Qing Dynasty into three stages: (1) Yongzheng period (2) Qianlong period (3) Jiaqing and Daoguang period (4) Xianfeng, Tongzhi, Guangxu and Xuan Tong period.