What is the difference between Foxconn ip and DP in the port area?

The difference between Foxconn dp and ip is that dp is post-produced. General mobile phone assembly, many people, clean workshop environment. All accessories provided by ip can be assembled into a complete mobile phone and can be used. Ip belongs to pre-production, and raw materials are used to produce various mobile phone accessories of dp. There are many machines in the general workshop, and the technicians are right. The workshop environment is almost bad. For example, the stamping workshop is ip, which is not good and the noise is too loud.