Year: 1950, one year after the liberation
Location: classroom, countryside

Sao Mang Ban (Wipe-out-illiteracy class, Sao means wipe out, Mang means illiteracy or blind and Ban means class) is a very important part of the national anti-illiteracy campaign. People who are going to the class except the teacher are all Wen Mang (illiterate people, Wen means civilization, Mang means blind). These classes are all free because most Wen Mang are poor peasants.

Year: 1980's and 90's
Location: classroom, big city

The national English-study-frenzy was direct result of the Go-Abroad-Fad. Many young students are showing intensive interest in learning English. Many Sao Mang Ban are tailored to students who are taking the TOEFL-GRE-America-start a new life path.

Year: 2000, during the Internet Revolution
Location: classroom, big city, countryside, everywhere

People from different occupations finally meet on the common ground - Internet Sao Mang Ban. Many people join the class because they saw the following headlines somewhere,
1. click here to make money for free
2. want to realize your dream to be a boss? click here
3. click here to change your life forever
4. looking for individuals who are committed to achieving financial stability in their lives, click me!

Many national frenzy, fad or campaign will result in numerous San Mang Ban. People don't want to be left behind wherever there is a new intensive popular interest, and it's only when there is intensive popular interest that many people realize they don't want to be left behind.