The following brands are authentic:

1. Yaomazi: Yaomazi is a well-known Sichuan brand in China, and its mountain pepper oil is considered to be very authentic.

2. Chuanbao’s Kitchen: This brand is a seller of Sichuan specialties. Its mountain pepper oil has a richer taste, full aroma, and is very authentic.

3. Hunan Xinxin: Hunan Xinxin is a famous condiment brand in Sichuan. Its mountain pepper oil is carefully made from high-quality Sichuan mountain pepper and has a rich and authentic taste.