Mark Okoth Obama Ndesandjo, the half-brother of US President Barack Obama, in Shenzhen. Photos: Nora Tam; Mark Obama Ndesandjo Private Collection

Ndesandjo, his wife, Liu Xuehua, and Barack Obama.

Ndesandjo attends a Nairobi to Shenzhen book-signing at Dymock’s, in the Prince’s Building, Central, in 2009.