↑ The character 柏 is traditionally pronounced "Bó". In modern standard Mandarin, some authorities favour the view that it is pronounced as "Bó" except when used to mean "cypress tree", when it is pronounced "Bǎi": see "柏", 《实用汉字字典》，上海辞书出版社 (Practical Chinese Character Dictionary, Shanghai Literary Press); "柏",《辞海》，上海辞书出版社 1999 (Cihai, Shanghai Literary Press), while other authorities favour the view that 柏 is pronounced as "Bǎi" when used as a surname, see, e.g., Xinhua Zidian 10th edition, p.11, Commercial Press 2004, ISBN 7-100-03931-2, and Modern Chinese Dictionary (现代汉语词典) 5th edition, p.30, Commercial Press 2005, ISBN 7-100-04385-9). Bo Yang himself always pronounced it as "Bo".
