Explanation:
The Spring Festival falls on the 1st day of the 1st lunar month, often one month later than the Gregorian calendar. It originated in the Shang Dynasty c. 1600 BC-c. 1100 BC) from the people's sacrifice to gods and ancestors at the end of an old year and the beginning of a new one.
In 1912, the government decided to take away Chinese New Year and the lunar calendar, but took in the Gregorian calendar instead and made January 1 the official start of the new year. After 1949, Chinese New Year was renamed to the Spring Festival.
Henry Ford was the first man to create the concept of the assembly line. This was when every employee was responsible for assembling only one part on Ford's cars. The assembly line was able to ramp up production and turned thousands of cars every month which resulted in more profits for Ford.
If the movie is perhaps a documentary, then it is telling you factual information of actual events (includes pictures or pictures of actual documents or events); this makes it a primary source.
If the movie is based off of real events, has factual information, but also has added information to create a well-rounded plot, this makes it a secondary source.
