(Bloomberg) -- Chinese regulators summoned gaming companies including Tencent Holdings Ltd. and Netease Inc. to discuss further oversight of the industry and the need to deemphasize profits, prompting a steep share selloff.Tencent, the country’s largest gaming company, dived as much as 6.7%, on track for its biggest fall since July, while smaller rival Netease fell as much as 7.7%.The Publicity Department of the Communist Party of China’s Central Committee, the National Press and Publication Adm