1. Trademark infringement: If "Nanchong Authentic Yangyazi" has been registered as a trademark by others, unauthorized use of the trademark constitutes trademark infringement. This may lead to legal disputes and economic losses.

2. Competition conflict: If competitors are already using the name "Nanchong Authentic Yangyazi" and have certain market influence and brand awareness, then you may cause confusion and competition conflict if you use this name again.