Gao did not disclose the financial details of the agreements, but said the documents will cover areas of medical science, hydro-power, agriculture and people's livelihoods.
"Angola is the third stop of Premier Li's Africa tour. The visit is of great significance in comprehensively improving China-Africa strategic partnership and consolidating the solidarity and cooperation among developing countries," he said.
Internal conflict and political instability had ravaged the country for years. Since the end of a civil war in 2002, Angola's economy has been growing rapidly thanks to the resumption of oil exploitation and massive reconstruction programs.
China has participated actively in Angola's post-war reconstruction and played a major role in building and repairing the country's poor infrastructure, including highways, railways, power plants and harbors.
In 2013, trade between the two countries reached 36 billion U.S. dollars. By the end of 2013, China's accumulative investment in Angola had exceeded eight billion dollars. Angola has become China's second largest trading partner in Africa.
Basilio Cassomo, an economic adviser to the Angolan president, said in an interview with Xinhua that Angola appreciates China's contribution to the reconstruction of his country.
Angola is currently trying to diversify its oil-dependent economy, and Li's visit will usher in a new era in bilateral cooperation and inject new vigor and vitality into the two countries' strategic partnership, he said.
Angola is the third leg of Li's four-nation Africa tour, which has already taken him to Ethiopia and Nigeria. He will then travel to Kenya.