Where can I buy Tianyu B92 1 headphones?

Generally, some are bought at mobile phone repair points! B92 1 headphone cable is also very easy to buy, because it matches! And I remind you that if you want to buy it, you should buy it in some small shops, not in any big mobile phone. It's just a big name, and it's expensive! I bought it once before. I bought one, and the boss said it was original Tianyu! It cost me 50 yuan and soon broke down. I bought another one some time ago. I bought it in a small shop, specializing in digital groceries! One is only 20, and the sound quality is good!