457-meter-long Guantang Bridge in South China's Guangxi is shrouded in fog on the day when it's opened to public traffic (Photos: Xinhua)

457-meter-long Guantang Bridge in South China's Guangxi is shrouded in fog on the day when it's opened to public traffic

457-meter-long Guantang Bridge in South China's Guangxi is shrouded in fog on the day when it's opened to public traffic

457-meter-long Guantang Bridge in South China's Guangxi is shrouded in fog on the day when it's opened to public traffic

457-meter-long Guantang Bridge in South China's Guangxi is shrouded in fog on the day when it's opened to public traffic

457-meter-long Guantang Bridge in South China's Guangxi is shrouded in fog on the day when it's opened to public traffic