Ronnie O'Sullivan is regarded as the first person in the field of snooker. O 'Sullivan enjoys a high reputation in snooker with his excellent skills and numerous achievements. He has set many records in his career and achieved success in many ranking competitions. Therefore, when discussing the best player in snooker history, O 'Sullivan is usually the first choice. Snooker is a kind of billiards. This sport originated in Sheffield, England in the19th century. Because its English name "Snooker" means "obstruction", it is also called obstacle billiards. The order of hitting the ball in a snooker game is usually from the red ball, then the colored ball, until all the red balls fall into the bag, and then leave the game in turn according to the score of the colored ball from low to high.