Hello Jingle!
I made an workaround here...
In the past this notebook use xubuntu and I remeber that speed inst so low.
So I boot from a live cd and extract the modprobe settings... Its works for me when I replaced into deepin folder.
Now I can reach >260Mbps
check my file (/etc/modprobe.d/iwlwifi.conf):
# /etc/modprobe.d/iwlwifi.conf
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system. When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \ (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \ && /sbin/modprobe -r mac80211
# Original deepin settings: options iwlwifi 11n_disable=8 bt_coex_active=0 power_save=0 swcrypto=1