 Complete the following phrase:  Riot Games directly participated in the tour operation, the tournament returned with the name Vietnam Championship Series, the total prize pool increased to 1 billion VND 200 million, the salary of coach and athletes increased to VND 4 million  month . In addition, VCS matches are held at GG Stadium - 6th Floor, Crescent Mall, District 7, Ho Chi Minh City built by Riot Games, instead of being organized online as before. Teams not based in Ho Chi Minh City will be supported by the organizers during the VCS Spring 2018. On 21 February 2018, VCS separated from GPL. This is a result based on the fact that in recent years VCS has always been the domit force of the GPL. Especially at the two spring and summer events in 2017. Impressive competitions at MSI 2017 and 