Alibaba as you know focuses on buyers and suppliers of goods, LinkChain focuses on connecting sellers of services e.g. graphic design, web design, copy writing and so on (similar to Upwork and others), with people 'buyers' - people that want to commission/ outsource or hire someone to do that. Their USP seems to be in leveraging the enormous userbase of LinkedIn (and other social media platforms), but making it easier to find suitable people and to find people that have been vetted as safe and good to do business with.