銘為柯銘為柏
[míng wèi kē míng wèi bó]
It's hard for those not familiar with Chinese characters to know it's read 'Ming Wei Ke Ming Wei Bai'. 'Ke' and 'Bai' are both common names in China, 'Ming', meaning carving, implies memory, so the whole phrase can express memories of two names that are dear to him.