Which brand of industrial endoscope is good? What are the famous brands?

At present, the domestic industrial endoscope market is very chaotic, from hundreds of thousands of products from Taobao and Tmall to tens of thousands of domestic products to hundreds of thousands of imported brands, which makes users who really need to buy very confused. Imported brands sell more in China, such as Olympus in Japan, Hualin in the United States, Visa in Germany and Lingchuang in Germany. These brands are better than domestic ones in both performance and workmanship, but they are more expensive, with high maintenance costs and long maintenance cycle. Domestic products are chaotic. Manufacturers with their own brands, such as Delong, Jietai and Jiutai, have dozens or even nearly a hundred brands besides the statistical 10 brand. Why? The reason is simple-OEM. This requires consumers to have a certain ability to distinguish, but the quality and performance of domestic endoscopes have indeed been greatly improved in recent years. Although there are still some gaps compared with imported products, the effect is good for some simple applications.