World leaders, including Chinese President Hu Jintao, arrived at the conference hall, taking a working lunch. The G20 host, French President Nicolas Sarkozy, also held a press conference before the leaders sat down for dinner. They discussed the major problems affecting the world economic recovery and the stability of the global financial markets. Other topics on the agenda for the summit include the eurozone debt crisis, reforming the international monetary system, and the strengthening of financial regulations. He said, \"Things are progressing, we are taking a great interest and giving total attention to what’s going on in Greece. And I think the message that was sent to the entire Greek political class yesterday, by Germany and France together, has helped a sort of realisation of how things might develop and, if this is confirmed, it would be welcomed by everybody.\" President Sarkozy said leaders from the world\'s top economies focused on the Greek debt crisis during meetings on their first day in Cannes. He said European leaders cannot accept the \"explosion\" of the euro, and cautiously welcomed Greece’s decision to scrap a referendum on a hard-fought European bailout plan. President Sarkozy said European leaders will meet again on Thursday night to try to work out ways to halt Europe\'s debt crisis.