Topping DACs

Anyone has heard of Topping DACs? They are made in China.
http://en.tpdz.net/products_list/pmcId=22.html
The Topping D50 (which costs less than $250) was recently measured at AudioScienceReviewhttps://audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-topping-d50-dac.24...and generated a massive interested (60 pages of comments).