G7 Hiroshima Summit: Fading Bloc Sticking to Its Guns to Contain China, Russia

Leaders of the Group of Seven will gather this weekend for the summit in Hiroshima, Japan, to discuss a vast variety of topics, with focus on Russia and China, as Western sanctions and the proxy war in Ukraine bear little, if any, fruit. What's the G7 and does the format correspond to the ongoing geopolitical changes?