const region1 = new Intl.DateTimeFormat('zh-CN', { timeZone: 'UTC' });
const options1 = region1.resolvedOptions();
console.log(options1.locale);
// Expected output: "zh-CN"
console.log(options1.calendar);
// Expected output: "gregory"
console.log(options1.numberingSystem);
// Expected output: "latn"