Unit hire many temporary workers this year, after return to work normally, leading the first thing to do is to find a enterprise instant messaging software, but requires that the software in use need to meet these temporary employees only docking personnel and production department, the internal core leadership and technical department can't docking with them, which requires software has set the function of the department to hide or hide, surf the Internet in recent days to understand some, basis functions are the same, about the hidden function department or personnel support only a few, now understand that like tencent RTX, and instant messaging, enterprise WeChat can support, but enterprise WeChat free cloud solutions, leadership don't want to use, privatization program is too expensive, wanted to see if there is no software is to meet this requirement,