Some teachers, I know them and they know me too, for example, my teachers and classmates in XJTU, OGI, and BiMBA;

Some teachers, I know them but they don’t know me, for example, my teachers such as Zhongtian Yi in Lecture Room or Lynda.com;

Some teachers, I never know their names, for example, roles in movies or TV shows I took a look, people in parks or on streets, etc.;

Some t…

Learning, has nothing to do with whether one is rich or poor, or one is living in a luxury house or in prison. As a Chinese old saying goes: people over 40 do not learn new skills, but modern people have longer life expectancy than their predecessors, not to mention another Chinese adage says: “learn as long as one lives” and “it is never too late to learn”.

For any country, improving and ext…