Old fruit fans know, as early as many years ago Apple in Apple Watch 4 first introduced a new electrocardiogram detection function (ECG), but the Chinese mainland users have not been able to use, the main reason is because the electrocardiogram function (ECG) belongs to the medical device function, you need to register the device and through the mainland China's medical device management to work. With users upgrading watchOS 8.3RC version, it has been possible to officially enable the electrocardiogram function (ECG), which also means that Apple has finally passed the approval of the ECG function, and Apple Watch is also considered a medical device.