China Daily: China and the United States agreed Saturday that regular dialogue on economic issues would now be expanded to include security and other issues. Details of the bilateral dialogue will be finalized by President Hu Jintao and US President Barack Obama at an economic summit in London in April, according to visiting US Secretary of State Hillary Rodham Clinton. The top US diplomat held extensive talks with top Chinese leaders including President Hu Jintao, Premier Wen Jiabao, as …