Rose or Pink-tailed Bunting (Urocynchramus pylzowi)

Two found at Lugu hu (lake). Very long graduated tail with no outer white feathers,slender beak and no white wing bars.Not much colour showing on either winter-plumaged bird but just a hint of pink on the lefthand bird. The photo was almost directly into very strong sunlight which didn't make it easier. But very unusual birds to find.