A bilingual typewriter with a plotter mechanism

I’m writing this post on a secondhand 科達牌中英文電子四色繪圖打字機 Fortec ET-888 Chinese–English electronic four-colour plotting typewriter I just bought. This was designed in Hong Kong in the 1980s and manufactured in Mainland China. It was never a popular machine, launched right at a point when Chinese computing was at its infancy.