I am in China with my wife and two small kids on a 2 x 60 days L visa. My wife is Chinese and not subjected to visa regulations. I left the country by myself once and returned, so I am on my second 60-days term, expiring end November. The visa for my kids expire next week, however (they carry their own passports and visa), but we would like to stay another two weeks or so. We experience difficulty to extent their visa, because PSB requires original documentation proving they are our kids, which we did not bring to China. What to do? And what if our kids would overstay their visa for 15 days? What would be possible consequences, in terms of fines, and ability to re-apply visa? If you overstay, do you just go through passport control to "surrender" or do you need to pepare and report for that differently?