Tianjin and Pretoria are friendly associated on June, 4th,  in 2004.

Pretoria is a city located in the northern part of Gauteng Province, South Africa. It is one of the country's three capital cities, serving as the executive (administrative) and de facto national capital; the others are Cape Town, the legislative capital, and Bloemfontein, the judicial capital.

It has a population of 2,345,908（2007）within the area of 1,644km2.

Pretoria is situated approximately 50 km (30 miles) north of Johannesburg in the north-east of South Africa, in a transitional belt between the plateau of the Highveld to the south and the lower-lying Bushveld to the north. It lies at an altitude of about 1,350 m (4,500 ft) above sea level, in a warm, sheltered, fertile valley, surrounded by the hills of the Magaliesberg range.

The Central Business District (CBD) of Pretoria has been the traditional centre of government and commerce, although today many corporate offices, small businesses, shops and government departments are situated in the sprawling suburbs of the city rather than the CBD.

Pretoria is home to the National Zoological Gardens of South Africa as well as the Pretoria National Botanical Garden, one of the National Botanical Gardens in South Africa.[5] There are also a number of smaller parks and gardens located throughout the city, including the Austin Roberts Bird Sanctuary.