HONG KONG, May 31 (Reuters) - ByteDance's short video app Douyin said on Wednesday that it has held preliminary talks with Dalian Wanda Group over the conglomerate's payments unit. Bloomberg reported on Wednesday, citing people familiar with the matter, that Wanda was in talks with prospective buyers include China's ByteDance to sell its digital payments licence for about 1 billion yuan ($144 million). It added, however, that the price could be lower based on talks. A spokesperson for Douyin, the Chinese version of TikTok, declined to provide further comment beyond acknowledging the preliminary talks. Wanda did not immediately respond to...