The usage of ensure vs. insure is very important from a contractual perspective, while they sound very similar they can have very different meanings in a legal context. Insure means to safeguard against loss or damage, typically through the ... Read more
Electrical sockets (outlets) in the People's Republic of China usually supply electricity at between 220 and 240 volts AC. If you're plugging in an appliance that was built for 220-240 volt electrical input, or an appliance that is compatible with multiple voltages, then an adapter is all you need.
Heavy industry and light industry use different voltages because usually the heavy industry has larger and more powerful machines, therefore the voltage needs to be higher. On the other hand, if high voltage is used in Light industry, with smaller less powerful machines, it could be very dangerous with risk of fire and harm or death to workers and staff.