That Liu Hun was a count is per his biographies in the Old Book of Tang and the New Book of Tang. The chronicle of Emperor Dezong in the Old Book of Tang gave his noble rank as viscount, not count. Compare Old Book of Tang, vol. 125Archived 2008-06-21 at the Wayback Machine and New Book of Tang, vol. 155Archived 2008-10-23 at the Wayback Machine with Old Book of Tang, vol. 13.
That Liu Hun was a count is per his biographies in the Old Book of Tang and the New Book of Tang. The chronicle of Emperor Dezong in the Old Book of Tang gave his noble rank as viscount, not count. Compare Old Book of Tang, vol. 125Archived 2008-06-21 at the Wayback Machine and New Book of Tang, vol. 155Archived 2008-10-23 at the Wayback Machine with Old Book of Tang, vol. 13.