bittersweet citrus xiankuhoutian de yu'tzu . the zest is thicker than an orange, but twice as thin as a pomelo ... what is this

bittersweet citrus xiankuhoutian zest thicker orange citrus xiankuhoutian citrus xiankuhoutian yu orange twice pomelo thicker orange twice thicker orange bittersweet citrus tzu zest thicker orange citrus xiankuhoutian yu tzu zest thicker yu tzu zest orange twice pomelo tzu zest yu tzu tzu twice pomelo xiankuhoutian yu xiankuhoutian thicker zest bittersweet yu twice