Is it safe? Probably. I've not used that brand, but I've used several different Chinese made off-brand batteries in different devices over the years, and none of them have harmed anything. As an extra precaution, I've bought my batteries from Amazon, and only bought ones that have a reasonably large number of customer reviews.
But if you're looking for extended run time, you may be disappointed. In my experience, these aftermarket batteries, in spite of their claims, have less capacity and shorter life spans than the OEM batteries. LI chemistry is the same no matter where you get the battery from, and without more cells, or bigger cells, you really can't get more power. And you can't cram more cells of the same size, or the same number of bigger cells, in the same space.