Is it expensive to buy a pair of black jeans 150 in a physical store?

Not expensive. As of May 29th, 2023, the price of a pair of ordinary black jeans in the clothing market in China was between 50 and 200 yuan. As long as you like those pants, 150 yuan is not expensive. Jeans, also known as "solid tweed pants", are overalls worn by early pioneers (cowboys) in the western United States. Generally, it is made of blended interwoven yarn-dyed denim mainly made of pure cotton and cotton fibers, and now it is used as tight casual pants for men and women.