bt is a polysemous word, and its meanings are: 1. bt refers to Baotou: Baotou, which is the homophony of the Mongolian "Baoketu", also known as Jiuyuan and Lucheng, is a prefecture-level city in the Inner Mongolia Autonomous Region, approved by the State Council

It is an important economic center in the Inner Mongolia Autonomous Region, one of the central cities in the Hohhot-Baotou urban agglomeration, and an important industrial base in China.

2. bt refers to Beijing Subway Batong Line: Beijing Subway Batong Line is the fourth completed and operational subway line in Beijing, China. The first phase of the project was opened on December 27, 2003.

The first phase of the south extension project was opened for operation on December 28, 2019. The logo color is red.

3. bt refers to an Internet term: bt is an Internet term, which refers to the abbreviation of the first two letters of abnormal; it also refers to the latest Weibo popular term, and its meaning is derived from English bound thinking, which refers to jumping thinking.

4. bt refers to the BT model: the BT model is the abbreviation of "construction-transfer" and is a new investment and financing construction model.

It is a process in which the government authorizes enterprises to finance and construct projects through concession agreements. After the project construction is accepted, it will be redeemed by the government. The government will use future fiscal budget funds to pay the enterprise the total project investment plus reasonable returns.

5. BT refers to blockchain technology: BT is translated as blockchain technology in Chinese. Blockchain technology uses new encryption authentication technology and a network-wide authentication mechanism to maintain a complete, distributed, and non-tamperable

Continuous ledger database, where participants use a unified and reliable ledger system and timestamp mechanism, is also called distributed ledger technology.