What does the Singapore Grand Slam qualifier mean?

Table tennis preliminaries Table tennis players are called grand slams after winning singles titles in the Olympic Games, the World Table Tennis Championships and the World Cup. Singapore Grand Slam is the top table tennis event, and the qualifying round is the preliminary round. Singapore Grand Slam Qualifying Tournament means the preliminary round of table tennis. WTT Singapore Grand Slam is one of the highest-level "Four Grand Slam" events in WTT series, and it is also WTT's first Grand Slam event. The singles champion of this event can get a prize of 654.38 million+US dollars, and the same 2000 points as the Olympic Games and the World Table Tennis Championships.