Australia have made a perfect start to the AFC under-19 soccer championship in China, thrashing Yemen 4-1 in their opening match.The Young Socceroos conceded the opening goal after just two minutes but they never looked back after Sydney FC's Kofi Danning levelled the scores little more than 10 minutes later.Australia scored twice more before the break to lead 3-1, before English-based Matthew Fletcher finished the scoring in the 83rd minute."Being behind 1-0, we did not panic," said coach Jan Versleijen."Knowing that we have a quality team we started to control the game and this difference ensured we were able to create and convert goal scoring opportunities."The second half we knew if we continued to control the game that chances would come and we managed to get one more goal and it could have been two or three more."The win leaves Australia on top of group D, ahead of the Korea Republic on goal difference.