BYD S6 Owner's Manual page 30

Let the child sit in the child seat.
Follow the manufacturer's instruction
to fix the child seat with the seat belt,
and insert the belt tip into the buckle.
Make sure that the seat belt isn't
twisted.
Check if the shoulder safety belt
crosses the child's shoulder properly,
and keep the waist belt as low as
possible.
BYD AUTO S6, S6A, S6K Owner's Manual
Remove the child protection device
fixed with seat belt
Press the buckle release button to
retract the seat belt completely.
Install child protection device with
ISOFIX rigid anchor (ISOFIX child
protection device)
Check the position of the dedicated
fixing lever and install the child
protection device onto the seat. Install
the fixing lever in the gap between the
seat cushion and backrest.
If the child protection device is
equipped with top drawstring, fix the
drawstring onto the anchoring device.
Driver and Passenger Safety 1-23