Nana and her boyfriend pose in front of a volcano in Ulanqab, North China's Inner Mongolia autonomous region, Feb 13, 2017. Nana's boyfriend lives in South China's Guangdong province. This year's Valentine's Day, the young man traveled to Nana's hometown in Inner Mongolia autonomous region. On Monday, the young couple spent zero yuan to visit a volcano in Ulanqab. [Photo/VCG]