Bannermen Identity and Chinalization of a Bannermen Elite during the Middle Qing Period: Study of Songyun(松筠), emu tanggū orin sakda i gisun sarkiyan (bai er lao ren yu lu 百二老人語録), and dzang ni ba na nirugan baitai šošohon i bithe (xi zhao tu lüe 西招図略)