Have not seen any armed guard on my layovers in PVG. I open the door to get my food they drop off and they are not great but to say barely anything edible is a stretch. You actually order the type of food you want before you leave USA such as western, local whatever, lots of fruit, omelet in the morning. Do I bring my own food? yes I sure do but the meals delivered to your room are edible. IMO You are walked to your room and out of your room. They have a sign you put out if you want them to ring your bell when the food arrives. The refrigerator works well if you bring your own or food and drink off the plane. The wifi is not very good but I used it, and the cell works well.