The Financial Post reports in its Thursday edition that Lululemon has apologized for a yoga event staged on China's Great Wall after it drew intense scrutiny over the use of a Japanese drum. A Financial Times dispatch to the Post reports that Lululemon, which has grown rapidly in China, hired actor Zhu Yilong to perform at the promotional event at the end of May. Lululemon issued an apology to both Mr. Zhu and the "general public" on Weibo, one of China's biggest social media platforms, after accusations circulated that the instrument in question was Japanese. "Due to limitations in our professional knowledge, we were unable to identify potential controversies," Lululemon said. It added it "should have been more cautious and thorough" and had removed "all related promotional content." Diplomatic tensions between China and Japan have been heightened after comments about Taiwan made by Prime Minister Sanae Takaichi in her first week in office last year gave Beijing ammunition for its claims that its neighbour was becoming more belligerent. The Great Wall incident highlights the risks for foreign brands promoting products in a rapidly changing social media landscape filled with cultural and political sensitivities.