Honey, which has two UK offices and one in Beijing, will provide consultancy, engagement and joint venture services, and make particular use of social media, to help increase brand awareness and market share for the three brands.
Bestek manufactures a range of products covering the telecoms, information systems, automotive and transportation, medical, life sciences and consumer electronics sectors. Honey's brief is to grow market share in the UK and US.
For Cubot, Honey will spearhead the launch of a range of high-end smartphones and manage PR activity at events including the upcoming Mobile World Congress in Barcelona.
Design brand EMIE makes a range of high-end smart watches, speakers and battery packs. Honey has already provided PR support for the brand at the Consumer Electronics Show 2016 in Las Vegas.
Mark Terry-Lush, partner and managing director of The Honey Partnership, described the brands as "future superbrands".
"What they create in China will disrupt established brands and win the hearts and minds of Western consumers," he said.
"Cubot, Bestek and EMIE recognise that if they place social at the heart of their marketing there is a global opportunity. These brands are incredibly understated, because they are more focused on product quality and innovation, so Honey will use its expertise to unlock their growth potential and expand their global footprints."