云南锡业集团（控股）有限责任公司原常务副总经理兰旭接受纪律审查和监察调查

Group 1 - The core point of the article is that Lan Xu, the former executive vice president of Yunnan Tin Company (Holding) Limited, is under investigation for serious violations of discipline and law, having voluntarily surrendered to the authorities [1] Group 2 - The investigation is being conducted by the Yunnan Provincial Commission for Discipline Inspection and Supervision [1]