Far from downtown Nanjing, Zhang these days oversees his interests from a lush commercial park where the memory of that first store is preserved in a museum.

FORBES: Clicking With New Customers

Buckmore Park is to hold another competition kart race in memory of Henry Surtees on 18 July, when his father will rename a bend on the circuit "Henry's Bend".

BBC: Chatham kart challenge in memory of Henry Surtees

The gathering in Sam's memory takes place at 19:00 GMT near his memorial bench in Chorlton Park.

BBC: Sam Walker: Lantern tribute for hit-and-run victim