Presumably this was printed sometime after 1981, as it features an award won in that year.
Thought it might be useful for those trying to discover what varieties of cloisonne were made in the 1980s.
Plus, a fascinating video of the Beijing Enamel Factory showing just how difficult it is to create cloisonne enamel:
https://www.youtube.com/watch?v=P6dDTR8SPu8 (Skip to 3:00 to avoid the puppet stuff intro)
Check out the differences in the staff clothing, work areas, and technology between the 1980s brochure and the 2013 video.