And to further clarify, as early as 2008 when I looked at it first, social insurance payments were required at the same rates employers and employees pay, with the main benefit being that if you already have other income (eg salary), your total social contributions should are capped at 5 times the average (eg if you've got a 3x the average salary, and a side gig getting you another 3x the average salary, you'd only be paying self-reported social insurance taxes on the extra 2x average salary).