Is there a reliable proxy investment company?

I heard that there are many people involved in ad placements in China, especially in Hunan and Hubei. However, they often engage in fraudulent activities, essentially providing fake metrics. Many companies have suffered from this multiple times. I want to know where I can find a reliable agency for ad placements. Now, the issue isn't the lack of budget, but the fear of being targeted by scammers.

The industry is becoming increasingly chaotic, and buying metrics is fraught with fraudsters.