HONG KONG/BEIJING (Reuters) - A company linked to China's scandal-hit Luckin Coffee Inc is seeking fresh capital, sources said, highlighting the ripple effect of Luckin's fabricated transactions as the chairman of both firms scrambles to avoid a cash crunch.UCAR Inc, founded by Charles Zhengyao Lu, is looking to sell its limited partner (LP) interest worth 1 billion yuan ($141 million) in Chinese private equity firm Centurium Capital's yuan fund, people with knowledge of the matter told..