Deputy finance chief Choy Man Har arrested in corruption probe days after Chongqing police release company’s ‘fragrance queen’ from house arrest

Wu Yi, former deputy general manager of China Tobacco Yunnan, comes under investigation four days after former colleague Zhu Shaoming

Zhu Shaoming, former head of China Tobacco’s biggest provincial unit, comes under investigation by graft busters

Investigations have ensnared nearly 20 senior officials in an industry that supports the habits of 300 million smokers