QingNanXu 青囊序 is known to be written by Zheng WenChang 曾文辿. The original version is called LongShui Jing 龙水经. This classic was renamed when it is included in DiLi BianZhen 地理辨正 as QingNanXu 青囊序 mutilated by Jiang DaHung 蔣大鴻. The greatest different is the missing chapters called Xiao XuanKong 小玄空. It is believed that he coined 大玄空 from here. It is said to have contained the methods of measurement with the LuoPan. Xiao XuanKong 小玄空 has been withheld as an annex to SanHe FengShui, a forerunner of SanYuan.
QingNanXu 青囊序 is never considered to be an important textbook for the YangGong GuFa (Old method) lineage for the reason that it is not written by YangGong himself. If you read the contents with the lens of YangGong method, it does fall in places. However, there are many "strange" terminologies or jargon that had confused a whole lots of FengShui masters past and current. For example: -
Perhaps we may simply not able to read as classical writing has no comma and full stops although it is structured in a 7 characters rhyme, common to all Tang Dynasty styles of writing, for example: -
Therefore, by this mysterious term or jargon called the Time Master (時師), you can virtually form another school of thought, otherwise it is just a simple expression of "to use the double mountains in profound (knowledgeable) contemplation". Well, someone told us that Time Master (時師) is the Heaven Plate. Really?
No matter what is to be said about QingNanXu 青囊序, as its name implied, it is a far more important Preface summarizing all of YangGong techniques, only if you are able to discern what has been written.
YiFengshui brings to you a simple translation of QingNanXu 青囊序 and if it doesn't bored you down, it will elevate you onto another levels of FengShui proficiency, hopefully.