870g is equivalent to the Kirin 810. Snapdragon 870 is based on TSMC. Made by 7nm process, including one A77 (3.19GHz) super core, three A77 (2.42GHz) large core and four A55 (1.8GHz) performance core, other aspects such as Adreno 650 and X55 5G The baseband has not changed, but the WIFI chip is only supported to FastConnect 6800. The Xining 810, produced by Huawei hisilicon, is a processor owned by Hisilicon.
The Snapdragon 870 chip is roughly equivalent to the Kirin 9000e chip.