Simplex, simplex, and half duplex.
Hope this helps!!
Answer:
When you move into a new home or apartment, the first thing on your checklist should be to have the <u>locks</u> changed
Explanation:
Changing the locks
Given that the way the previous owners of the new home or apartment made use of the locks and the keys are usually not completely known to the new owners, one may never know all those that have a key or a means to gain access into the apartment or home. Therefore, in order to guarantee proper security, it is a good practice to have as one of the first thing on the checklist, the changing of the locks of the entrance doors and windows of the new home or apartment.
This isn't school related but I'm still gonna help you so you should check the location to see if it's set to be in China if it isn't change it to China if that doesn't work I would just recommend calling customer service if you can.