Is it necessary to buy tickets to enter the Olympic Sailing Center?

Of course you need tickets if you want to visit the projects. There is no need for tickets for the square.
There are no tickets required for the square, but tickets are required to enter the venue and visit various projects.
Of course you need tickets if you want to visit the projects. There is no need for tickets for the square.
There are no tickets required for the square, but you need to buy tickets to enter the venue and visit various projects.