Meizu has started recruiting Android 11 beta testers for its Meizu 17 series in China, which includes the Meizu 17 and Meizu 17 Pro. The company currently has 3000 slots for each device and is already rolling out the first beta update for the Meizu 17 duo. Those interested can enroll in the beta program by heading to the Settings > System Update menu on their smartphone and fill in the required details. But do note that beta firmware is not as stable as the official builds and may contain bugs that hamper the user experience. Meizu says you can't roll back to the stable version...
Source: https://www.gsmarena.com/meizu_17_17_pro_android_11_beta-news-46873.php