<P> Cheonan, Daejeon, Incheon, Jeju, Jeonju and Suwon were the six cities chosen to host the competition from a shortlist of nine, with Seoul, Pohang, and Ulsan not chosen . </P> <Table> <Tr> <Th> Cheonan </Th> <Th> Daejeon </Th> <Th> Incheon </Th> </Tr> <Tr> <Td> Cheonan Stadium </Td> <Td> Daejeon World Cup Stadium </Td> <Td> Incheon Football Stadium </Td> </Tr> <Tr> <Td> Capacity: 25,814 </Td> <Td> Capacity: 39,654 </Td> <Td> Capacity: 19,649 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th_colspan="4"> Cheonan Daejeon Incheon Jeju Jeonju Suwon 2017 FIFA U-20 World Cup (South Korea) </Th> </Tr> <Tr> <Th> Jeju </Th> <Th> Jeonju </Th> <Th> Suwon </Th> </Tr> <Tr> <Td> Jeju World Cup Stadium </Td> <Td> Jeonju World Cup Stadium </Td> <Td> Suwon World Cup Stadium </Td> </Tr> <Tr> <Td> Capacity: 29,346 </Td> <Td> Capacity: 41,785 </Td> <Td> Capacity: 42,655 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Cheonan </Th> <Th> Daejeon </Th> <Th> Incheon </Th> </Tr> <Tr> <Td> Cheonan Stadium </Td> <Td> Daejeon World Cup Stadium </Td> <Td> Incheon Football Stadium </Td> </Tr>

When is the under 20 world cup starting