China's "Golden Week" national holiday is under way, and social media users are making light of travel problems that are dogging the annual getaway. Social media are dominated by video and images of the congestion that is hampering travel to popular destinations such as Beijing. Official newspaper China Daily estimates that some 650 million people will travel within China this week, with a further six million heading abroad. Golden Week is one of only two extended periods in which Chinese people can take time off during the year, the other being Chinese New Year, which falls in January or February.