The original poster is asking about TREK mountain bikes. This is a Trek mountain bike.
Trek is an American bicycle brand, basically as famous as Lightning. However, like the Lightning, most models are produced by OEMs, the cheaper ones are made in China, and the more expensive ones are made in Taiwan.
If it is a complete Trek vehicle priced below 5,000 yuan, I suggest you not to buy it, and go look for Giant or Merida. There is no value for money in a car at this price, and it is basically sold under the TREK trademark. In fact, Trek and Lightning bought frames, but the frames used in cars under 5,000 are not very good, and the configuration is lower than that of Merida Giant cars in the same price range.
There seems to be only one Trek store in Tianjin, located at No. 301 Jiefang South Road