"If people could show being stuck to their commitments, then the G20 will be successful. A lot of the questions will be decided here. I hope there will be positive outcome. We will wait and see," van Loan said.

On China-Canada economic and trade relations, the minister said that he is optimistic about the bilateral ties.

"Since Premier Harper visited China last year, a new chapter opened in that relationship," he said.

In Loan's view, economic and trade relations between the two countries are complementary. Canada offers China tremendous opportunities in terms of resources such as chemical, uranium and oil sands, while having tremendous appetites for manufactured products from China.

The two sides have just signed a series of new economic and trade cooperation agreements during Chinese President Hu Jintao's visit to Canada this week.

"These commitments and agreements are very positive. I see nothing but to forward that progress on the relationship," he added.

The Canadian official said China, as an economic power-house, a major emerging economy, and one of the world's largest and strongest economies, plays a key role in the G20 which is focused on economy.

"China has been showing good leadership heading into this summit," he said.