Half price iPhone 13 battery replacement is probably only for China

Apple is claimed to have announced a half-price battery replacement service for iPhone 13 users in China.
Apple's iPhone 13
When it first came out, the iPhone 13 range and in particular the iPhone 13 Pro Max was said to be Apple's undisputed battery life champion. According to China's City News Service, however, there have subsequently been spurious worldwide reports of battery swelling or performance degradation.That claim has not been verified, but the publication says that consequently Apple