This girl has all features of a ball jointed doll, including opened eyes sockets and removable head cap. She is petite - 22 cm tall, with 6 mm eyeballs - very light and can make a nice company either as a friend or an art object.
You will need a piece of thin rubber string roughly 60 cm long, cut into 3 even parts which are then tied to form 3 loops (2 loops for the legs and one loop for both arms) and 5 tiny S-hooks. The S-hooks can be made of thin metal wire.
The stringing of the doll is quite standard, except for the additional wires printed in her knee joints, elbow joints, thighs, shoulders and neck. These wires are typical to the dolls with hollow joints and serve the purpose of keeping the string in place. A short video below can give you a better look at the doll's joints and how the string should run through them (it features the model with closed head but the joint system is the same). Here you can also see the head cap lock mechanism https://www.youtube.com/watch?v=TrJ-xzE7D-g
Hope you will enjoy your time with this girl!