Chinese passport
Before his debut, Han entered Korea with a vacation visa and had to return to China every three months to renew it. After debuting in 2005, his company obtained an E-6 (Entertainment Industry) passport, allowing him to stay for longer periods. However, a Chinese passport strictly limited his promotional activities and appearances in various broadcasting corporations in Korea. By law, a Chinese passport holder is only allowed to perform on three television stations. Han was allowed to perform on KBS and SBS, as stated by Lee Soo Man during a Harvard Korean Wave conference in early 2007. Initially, the company did not know of the procedures and was fined because of it. Before Han signed contracts with KBS and SBS, he performed on stage with a mask and a hat to hide his face on screen. Many thought Han was a backup dancer until three months later when his bandmate Kim Heechul finally revealed him to the media by publicly taking off his mask.