new way to urge BF to study. Haha, it shows that you are a very careful girlfriend, but BF also cares about you, otherwise he wouldn't study so hard. Just for this reason, you have to give him a good gift.
In this case, the gift doesn't have to be very formal. A creative and cute gift is fine. I suggest giving him a DIY certificate with the words "Best Boyfriend Certificate" on it, which is quite funny. You can also customize some other creative gifts to reward your boyfriend, such as chocolates with customized blessings, cartoon dolls made from real photos, etc.
Of course, you can also give him something he likes, such as a lighter. Such a reward is of course to make him happy. Haha, I hope it helps you.