Running in the Notorious Joburg CBD--One and only Chinese?

For those don’t know Joburg:
1. Nowadays, Even South African avoid Joburg CBD, which was built in the early of last century, by that time, a real business centre with skyscrapers and very diversified life of White privileged.
2. Run Your City running series: Sponsored by ABSA(one of South Africa’s largest bank, used to be called Barclay Africa), covers Cape Town, Tshwane(Pretoria), Durban, and Johannesburg. Each a 10k run.