LAHORE - Pakistan Muslim League-N Chief Nawaz Sharif has said charter of democracy is the only way to counter the problems facing by the country. Talking to media men on the occasion of Chehlum of his uncle Mairaj-ud-Din on Monday, Nawaz Sharif said his party did best to cooperate with PPP but they had totally failed to do a single bit towards delivery of public service. He said possibility of a unification of political forces can not be ruled out on a single agenda of national interest, stressing that all these forces must evolve a consensus on the agenda of countrys future. He said he would not react in haste to President Asif Ali Zardaris response to the formers letter. The matter involves a number of issues, he added. Nawaz Sharif reiterated that China was our best friend and he was grateful to the Chinese Prime Minister for his remarks about him. He said it was imperative to chalk out a national agenda for the future of the country on which all the forces are on same page.