It's hard to say- they sat in some places that they are based in Beijing, but they are registered in Sweden. They have things like martial arts on the site, but they also give names and photos, which is a positive sign. My gut feeling is that they're probably not bad, but I think I would see how they responded when contacted before trusting them. Have you had any direct contact?
Worldlinkedu.com??? Reputable? 
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