Hydraulic jacks are also used when lifting cars/other vehicles for replacing the flatten tyres. We know them by the name, "car jacks". The device/equipment is also used in cranes to lift heavy loads.

Bosses are also usually guarded about meeting new people. It comes with the territory. Anyone with a successful business in China is going to be in very large demand from a very large pool including just about everyone in the extended circle of the boss friends, relatives, employees, suppliers, political contacts.