Extract normal letter and chinese character using regex

extractLetterOrChinese.ts

const mixedLetter: string = "what is this 肌肤困扰 means?";

/*
* Extract only the normal text (without chinese)
*/
const extractNormalText = (text: string): string => {
    return text.replace(/[^a-z\d\s]+/gi, '');
}

/*
* Extract only the chinese characters
*/
const extractChineseCharacters = (text: string): string => {
  return text.replace(/[^\u4E00-\u9FA5]+/gi, '');
};

console.log(extractNormalText(mixedLetter)); // "what is this means?"
console.log(extractChineseCharacters(mixedLetter)); // "肌肤困扰"