Some hotels in western cities such as New York and London have no 13th floor because 13 is an unlucky number in the West. I once stayed on the 20th floor of a hotel in Hong Kong that combined East and West—the 4th, 13th and 14th floors were all missing. The so-called 20th floor was actually the 17th floor.
The number 6 is also considered lucky in China. The word for 6 sounds like a word “Liu” that means `flowing freely’ or`everything will go smoothly’. Because of this, the number 666 is considered one of the luckiest numbers in Chinese culture. It is often displayed in shop windows and neon signs. License plate AW6666 was recently sold for $272,000 yuan (US$34,000) in an auction to an anonymous bidder in Guanzhou.