Lodakang science and technology ltd. (known as lodakang) is located in an ancient city of history and culture, which has been written for more than 600 years, and is at the same time a city of modern air and economic development, one of the four cities directly under china's administration, the economic centre of the north of china, the city of international ports, the eco-city of tianjin. The city of tianjin is located in the north-eastern part of the chinese north plain, downstream of the river basin, at the centre of the ringhead bay, at the east side of the sea of ping, at the centre of the ring of yan, at the centre of the ring of the economy, at the centre of the large open city of the north of china, at the origin of modern-day industry, at one of the early open coastal cities of the north of china, and at the centre of maritime transport and industry in the north. In 2009, agreement was granted to the city of tianjin to adjust the administrative division of the new coastal z...