Hi Elena, in Chinese, numbers are important. The number 4 sounds very similar to the word for "death", and so it's not a number people are excited about. Some places in China will not have a 4th floor, or will take out the number 4 from all rooms, etc...
The number 8 sounds like the word for "rich" (more or less), and is considered a lucky number. Lots of people will try to incorporate this number everywhere (their phone number, license plate, the name of their store, etc...)
This is a fun question! Hope you enjoy all the responses.