Answer Wiki. As part of any industrial printing process there is a need to check if the printed colors match the desired colors. There are simple photo eyes that require large, regular, often rectangular or square swatches to verify that color is correct prior to the next investment.
Standard Chinese (known in China as Putonghua), a form of Mandarin Chinese, is the official national spoken language for the mainland and serves as a lingua franca within the Mandarin-speaking regions (and, to a lesser extent, across the other regions of mainland China).anguage laws of China do not apply to either Hong Kong or Macau and hence have different official languages (Cantonese, English and Portuguese) than the mainland. For example, Tibetan has official status within the Tibet Autonomous Region and Mongolian has official status within Inner Mongolia.
They speak Shanghai dialect/ Wu dialect in Shanghai. Wu dialect, like Cantonese, is unintelligible (not understandable) to mandarin speakers. The reason is because modern Chinese (mandarin) has been heavily influenced by Altaic languages while Shanghainese and Cantonese more or less kept their original pronunciations.