What you see is the string after DOT

1G means that this tire is produced at Hankook Jiaxing Factory

BT is this tire The specification code (Hankook's own representation)

HX is the pattern code of this tire (Hankook's own representation)

H is the brand name, inside Hankook It refers to the product name Hankook

I don’t know if you have looked carefully. There is a string of letters DOT followed by 4 numbers. The first two digits are the production week of the tire, and the last two digits are the year of production. The other side has only letters and no four digits