Small national flag makers are used to mark mark the position for all leaders of the G20 nations group photo at the G20 Summit in Los Cabos, Mexico. Some leaders just are standing on his country's flag, but Hu not.
After the group photo, President Hu Jintao picks off Chinese national flag, while Barack Obama and Angela Merkel just notice this old guy's "strange" behavior.
After this summit leader "power" show, President Hu Jintao carefully collect his motherland's national flag. He is the only leader to do this!