A staff introduces purple sand teapots to a visitor during an exhibition in Bandar Seri Begawan, Brunei, on Nov. 15, 2018. A series of cultural exchange activities including exhibitions and seminars were held in Brunei's capital Bandar Seri Begawan on Thursday to boost China-Brunei cooperation. (Xinhua/Wang shen)

A visitor takes a photo of a Chinese embroidery work during the Splendid Chapters of Silk Road Cultures exhibition in Bandar Seri Begawan, Brunei, on Nov. 15, 2018. A series of cultural exchange activities including exhibitions and seminars were held in Brunei's capital Bandar Seri Begawan on Thursday to boost China-Brunei cooperation. (Xinhua/Wang shen)

Visitors watch Chinese embroidery works during the Splendid Chapters of Silk Road Cultures exhibition in Bandar Seri Begawan, Brunei, on Nov. 15, 2018. A series of cultural exchange activities including exhibitions and seminars were held in Brunei's capital Bandar Seri Begawan on Thursday to boost China-Brunei cooperation. (Xinhua/Wang shen)