SHENZHEN: Hundreds of Chinese investors who lost savings in the collapse of China Evergrande launched a coordinated campaign this month to press authorities for an update on the failed property developer, according to people with knowledge of the effort. In the previously unreported action, small groups of disgruntled investors turned up at three Shenzhen government offices in succession to ask for an update on an investigation launched more than a year ago, the people told Reuters. They said