English folder meaning link: https://wenku.baidu.com/view/451732ff04a1b0717fd5ddf8.html
Common suffix links: https://wenku.baidu.com/view/db8ecdd6240c844769eaeef4.html?rec_flag=default&mark_pay_doc=2&mark_rec_page=1&mark_rec_position=3&mark_rec=view_r_1&clear_uda_param=1&sxts=1524470362572