anyone 
I would submit the log record like you, but they're all in Chinese. Do i need to translate them by the professional translator?If they are general communication, just use a log. If there is important evidence it might pay to have it (that part of) translated by an approved translator service.
We supplied this with a cover letter explaining a few things.
https://www.dropbox.com/s/htjonooqj470p5w/Skype log.pdf?dl=0