in Don't Don. The group are also acclaimed for their vocal harmonization and unison as each member contributes a different range in their choruses, and often incorporate different types of vocal belting into their songs. Philanthropy Super Junior were ambassadors to many bodies. They were selected to become the ambassador of Ansan city in 2007, and Gangnam District in 2012. They were also appointed as the goodwill ambassadors for the 2008 Korea and Thailand 50th Anniversary, honoring the good relationship between the two countries. On February 20, 2010, Super Junior were named as Taiwan's tourism ambassadors, and as the ambassadors for Korean tourism by Korea Tourism Organization on July 25, 2011. Super Junior are also spokesmodels for the "Donate Blood" campaign at the Republic of Korea National Red Cross since 2007 and were appointed as goodwill ambassadors for World Blood Donor Day. On March 3, 2011, Super Junior were appointed by the Ministry of Food, Agriculture, Forestry and Fisheries of Korea as the 2011 Honorary Korean Food Ambassadors to promote Korean cuisine all over the world. On June 17, 2011, Super Junior were chosen to be the ambassadors of Seoul Summer Sale 2011. They have also been appointed to the same position for Seoul Summer Sale 2012, and 2016. Controversies Expansion to China Following the subgroups Super Junior-K.R.Y. and Super Junior-T, on October 2, 2007, SM Entertainment announced the birth of another Super Junior sub-unit project that would begin activities in China starting 2008. Zhou Mi and SM Entertainment's new Taiwanese-Canadian trainee Henry Lau, who was also featured in the music video of "Don't Don", were also members of the subgroup. The announcement brought in a huge wave of dissatisfaction and opposition from some fans of Super Junior after the announcement of two new members. Thousands of fans from Super Junior's official fanclub E.L.F. silently sat in front of the SM building and held signs that supported the group having thirteen members. After more rumors regarding adding another member to the subgroup, the fans decided to gain a legal representation as part of SM Entertainment's stockholders. As of March 20, 2008, Super Junior fans purchased 58,206 shares of SM Entertainment, holding 0.3% of the company's entire stock. The fans released a statement that they will take every opportunity to prevent SM Entertainment from adding new members and to keep Super Junior as only thirteen. Conflict with MBC A time-slot dispute