class Alex {

  public age: number;
  private name: string;
  protected sex: string;
  
  constructor() {
    this.name = 'Alex';
    this.age = 18;
    this.sex = 'male';
  }
  
  static sayHi() {
        return `Hi! my name is ${this.name} , a great front-end developer! `;
  }
  
  introduce() {
        return {
              'Educational background':'Bachelor degree, Department of Automated Science and Technology, Beijing Institute of Technology(ZhuHai)',
              'Currently learning':'Javascript, Typescript, Java, Vue, React, Node, MySQL, MongoDB',
              'Ask me about': 'Anything related to what I am currently learning',
              'The direction of efforts':'Be an excellent programmer and to make a difference in the world! ',
              'Personal blog': 'https://www.tiantian96.ltd',
            };
   }
}