China offered African governments a multibillion-dollar package of financial and technical assistance on Sunday, stepping up a courtship that already has gained Beijing wide access to oil and minerals across perhaps the most resource-rich continent in the world.Prime Minister Wen Jiabao pledged to grant African countries $10 billion in low- interest development loans over the next three years, to establish a $1 billion loan program for small and medium-size businesses, and to forgive the remaining debt on certain interest-free loans that China previously granted less-developed African nations.Mr. Wen told officials of the 49 African nations in attendance that this year’s session “represents a new stage of development in relations with Africa.”Besides the financial assistance, Mr. Wen also promised to form a partnership to address climate change in Africa, including the building of 100 clean-energy projects across the continent. Beijing will also remove tariffs on most exports to China from the least-developed African nations that do not have diplomatic relations with Taiwan, and sponsor an array of other programs in health, education, culture and agriculture.