The top executive of Wuliangye Yibin – China’s second-largest liquor producer – has come under investigation for suspected corruption.Zeng Congqin, 57, chairman and party secretary of the state-owned liquor giant, is suspected of serious violations of party discipline and law – a typical reference to corruption – the provincial anti-corruption body, Sichuan Discipline Inspection Commission, announced on Saturday night.Zeng is being investigated by authorities in Yibin, a major city in the...