Céramique Tesson Oeuvre (étude et analyse) Analyse scientifique Yongzheng 雍正, empereur de Chine Gugong Nandaku chutu hei di falang cai ci de kexue fenxi he gongyì yanjiu 故宫南大库出土黑地珐琅彩瓷的科学分析和工艺研究 = Test and Process Research into The Piece of Enamel Painted Ceramic Shard with Black Background Unearthed in Nandaku of The Forbidden City