Chinese Premier Wen Jiabao is expected to arrive here on an official visit to Tanzania later this week as the sixth leg of his seven-nation Africa tour.

Following are major events in the development of Sino-Tanzanian relations:

-- China formed diplomatic ties with then Tanganyika in 1961.

-- China forged diplomatic ties with Zanzibar in 1963.

-- China established diplomatic relations with the United Republic of Tanzania in 1964 when Tanganyika and Zanzibar merged.

-- China and Tanzania signed an agreement on economic and technical cooperation in 1964.

-- Tanzanian president Mwalimu Julius Nyerere visited China in 1965,1968, 1974, 1981 and 1985.

-- China and Tanzania signed a treaty of friendship and a trade agreement in 1965.

-- Chinese premier Zhou Enlai visited Tanzania in 1965.

-- Tanzanian prime minister Edward Sokoine visited China in 1978.

-- Tanzanian prime minister Salim Ahmed Salim visited China in 1984.

-- Tanzanian president Ali Hassan Mwinyi visited China in 1987 and 1992.

-- Tanzanian prime minister John Samuel Malecela visited China in 1994.

-- Chinese premier Li Peng visited Tanzania in 1997.

-- Tanzanian president Benjamin William Mkapa visited China in 1998,2000 and 2004.

-- Tanzanian prime minister Frederick Sumaye visited China in 2000.