What do researchers usually call colleagues, workers or researchers?

In the research institute, there is no fixed regulation on the address of colleagues, which is usually determined according to their titles, positions, working relationships and intimacy. Generally speaking, colleagues engaged in the same research project will be called by their first names or nicknames such as Xiao Wang and Xiao Zhang. For older colleagues, they will call a worker; For leaders, they will call a worker or a title; For ordinary operators, they will call a master; For colleagues who are not in the same research project, they will call a worker or lead a title. In the research institute, it is ok to call a worker or a researcher, but a researcher may make people feel a little too formal and distant, so a worker is more intimate.