(Reuters) - Chinese coffee chain Luckin Coffee Inc fired its chief executive and chief operating officers following an internal probe on fabrication of annual sales numbers, the company said on Tuesday.Luckin, a major rival to Starbucks in China, revealed in April that much of its 2019 sales of about 2.2 billion yuan (252.88 million pounds) were fabricated by its COO and other employees, who had been suspended while the company carried out its investigation.Jenny Zhiya Qian and Jian Liu, who..