Brian Batz, or Sleep Party People, grew up on Bornholm, a picturesque but isolated Danish island with less than 40,000 inhabitants. So his first tour of China in 2015 was pretty shocking. The lonesome beauty of Batz’ childhood home plays a major role in the development of Sleep Party People’s wistful, brooding dreampop. The solo artist is poised to return to China for a six-city tour this month.