The ceremonies, handshakes, meetings and speeches, banquets and performances of this year's G20 Summit have now come to an end.

In fact, they ended on Monday after the leaders of the world's 20 major economies met in Hangzhou, East China's Zhejiang province, and a long list of agreements were signed.

But these were not the be-all and end-all of the 2016 G20, as it is likely to have a lasting legacy in international relations, with China leaving its stamp on the G20 as a mechanism to coordinate future actions by the world's leading economies.