How to capture remote device's traffic?

edit

How can I analyze traffic of my devices with my PC?

You could capture the wireless traffic with an 802.11 adapter in monitor mode, decrypting if required. This can be difficult, but is often done. See https://wiki.wireshark.org/CaptureSetup/WLAN.

You could also install a tap or configure such functionality between the AP and the router which leads all that traffic upstream, which you claim to be China. Wired traffic is often easier to analyze but you may need equipment or configurations to collect wired traffic properly. See https://wiki.wireshark.org/CaptureSetup/Ethernet.

May be is it possible to route all traffic of devices to PC?

Yes, with some configuration and/or network trickery. There are tools for this, such as Ettercap or Cain and Abel, and several ways to do this - you could setup your PC as a gateway to route traffic, or use arp cache poisoning, or DNS hijacking, etc.

For me, I would figure out how to get the wired traffic as it leaves the AP and enters the network, acquiring the necessary equipment, as needed, to make this happen.