Walking through there and nearby HongKong it’s literally well educated individuals in garages each doing a ‘thing’ that all comes together to make something bigger. No investment needed here.
As in I witnessed a bespoke electric motor manufacturer that was in the ground floor garage space with a couple of guys neatly winding insulated copper around an iron bar cut to the size needed (very large).
You might see a massive train motor and say ‘where’d they get the funding to start this bespoke train motor company’. But it’s literally a couple of guys in an area where they have another couple of guys make the custom brushes, someone else doing the housing, they wind on the coils and boom you have a bespoke motor manufacturer. No investment needed.