Tianjin and Texas  are friendly associated on March, 26^th, in 2003.

Texas is the second-largest U.S. state in both area and population, and the largest state in the contiguous United States. The name had wide usage among native Americans, meaning "friends" or "allies".Located in the South Central United States, Texas is bordered by Mexico to the south, New Mexico to the west, Oklahoma to the north, Arkansas to the northeast, and Louisiana to the east. Texas has an area of 696,241km2, and a growing population of 24,326,974 residents（2008). 

Houston is the largest city in Texas and the fourth-largest in the United States, while Dallas–Fort Worth and Houston are the 4th and 6th largest United States metropolitan areas. Other major cities include San Antonio, El Paso, and Austin—the state capital. Texas is nicknamed the Lone Star State to signify Texas as an independent republic and as a reminder of the state's struggle for independence from Mexico. The "Lone Star" can be found on the Texas State Flag and on the Texas State Seal today.

Texas contains diverse landscapes that resemble both the American Southeast and the Southwest.Most of the population centers are located in areas of former prairies, grasslands, forests, and the coastline. Traveling from east to west, one can observe terrain that ranges from coastal swamps and piney woods, to rolling plains and rugged hills, and finally the desert and mountains of the Big Bend. Due to its long history as a center of the American cattle industry, Texas is associated with the image of the cowboy.

Texas had a gross state product (GSP) of $1.09 trillion, the second highest in the U.S.Its GSP is comparable to the GDP of India or Canada which are ranked 12th and 11th worldwide. Texas's economy is the third largest in the world of country subdivisions behind California and Tokyo Prefecture. Its Per Capita personal income in 2007 was $37,083, ranking 22nd in the nation. Texas's large population, abundance of natural resources, and diverse population and geography have led to a large and diverse economy. Since oil was discovered, the state's economy has reflected the state of the petroleum industry. In recent times, urban centers of the state have increased in size, containing two-thirds of the population in 2005. The state's economic growth has led to excessive urban sprawl and its associated symptoms.Texas has a "low taxes, low services" reputation. According to the Tax Foundation, Texans' state and local tax burdens rank among the lowest in the nation, 7th lowest nationally; state and local taxes cost $3,580 per capita, or 8.7% of resident incomes.

Texas has the most farms and the highest acreage in the United States, and leads the nation livestock production.

Texas has known petroleum deposits of about 5 billion barrels (790,000,000 m3), which makes up approximately one-fourth of the known U.S. reserves.

Texas's affluence stimulates a strong commercial sector consisting of retail, wholesale, banking and insurance, and construction industries. Examples of Fortune 500 companies not based on Texas traditional industries are: AT&T, Men's Warehouse, Landry's Restaurants, Kimberly-Clark, Blockbuster, Whole Foods Market, and Tenet Healthcare.[155] Nationally, the Dallas–Fort Worth area, home to the second shopping mall in the United States, has the most shopping malls per capita of any American metropolitan area.

With large universities systems coupled with initiatives like the Texas Enterprise Fund and the Texas Emerging Technology Fund, a wide array of different high tech industries have developed in Texas. The Austin area is nicknamed the "Silicon Hills" and the north Dallas area the "Silicon Prairie". Texas has the headquarters of many high technology companies, such as Dell, Inc., Texas Instruments, Perot Systems, AT&T and Electronic Data Systems (EDS).