Build No.: BV7000_PRO_Blackview_20170523
When I said "it burns" I mean it hot. The metal(-like) part of the phone where the camera and fingerprint sensor is attached.
It heats up in that area because that is where the cpu and gpu chip is situated, if its a heavy load it will heat up, as for charging it is using a usb type c at 5v 2a which means its delivering charge faster, electricity transfers heat, there is nothing to fear.