September1，Rainyday
ZhengMin'sbrainwasbroken.Icouldn'tmakehimchangeintheend.Hewenttowarwithhisgoodbrothers.Ineverunderstoodhisbraincircuits.
Well，hecandieifhewantsto，andI'llnevermindhisbusinessagain.Asamatteroffact，Ihavenopoweroverhisbusiness.Ievendon'thaveaXiuqisystem.
I'vebeentryingtoreadthatlinearalgebrabookforawhilethesedays.Themanwhowrotethisbookisprobablyanut.Readingexperienceisterrible.
Theprefacetothebookisquitenormal.InadditiontointroducingthecontentsofthebookasIhavereadotherbooksbefore，theprefacealsotellssomeinterestingthingsabouttheauthor'slifeandsomeoftheapplicationsofthebook.
Theauthor，likeSiWuke，isadiscipleofXuhuaxianzong，andeventheirteacheristhesameperson.Morespecifically，SiWukewastheirteacher'sfirststudent，andthisauthorwastheirfifth.Thecontentofthislinearalgebraisoneofthefoundationsoftheauthor'sachievementofconstructingbases.
Accordingtotheauthor'sintroduction，theauthor'slinearalgebraopensupanewwayofbreakingandarrangingmatrices.Eventhelinearalgebracanserveasthebasisforalchemy、refiner、cartography、andself-cultivation.I'lljustsmileaboutit.
Iadmitthatlinearalgebraisuseful，butthisisforscience.Canlinearalgebraexplainpletelyunscientificthings？Quantumspeedreading？hahahhh～
ThemainreasonIsayit'saterriblereadingexperienceisbecausethesampleandexercisesinthebookaresodamnbad.Inadditiontothisbook，whichversionofnormallinearalgebrawillbetestedwithquaternionlinearequationsinthefirstexampleinchapter1？Don'tordinarybooksgofromsimpletoplex？
Andthenthecoefficientsofthesystemarenoteasytocalculate.Forexample，thecoefficienttermsandconstanttermsoftheunknownsinthefirstrowofthisfirstsystemare8、5、12、12，thesecondrowofthisequationis15、0、13、25，thethirdrowofthisequationis0、6、18、9，Thefourthrowofthisequationis5、14、4、0.
Inthisbook，youcanseealotofverylargematrices.Asystemoflinearequationswithonlyfourelementsisextremelyshort.Theauthorispurelyill.Perhapsthesewould-beimmortalsarejustoutoftheirmind？It'snotadifficultequation，butit'salittletrickytosolve.
本小章还未完，请点击下一页继续阅读后面精彩内容！Apartfromthefactthatthespecificationsofthesematricesanddeterminantsareparticularlyoutrageous，thebookhasafatalproblem.Whatfoolbutthisretardedauthorwouldreplacetheunknownwithanherbwithunreasonablyplexlines？WithoutanABCinEnglish，can'tyoureplacetheunknownwithtriangles，squaresandpolygons？Thewriterisoutofhismind！
I'msureI'llfinishthebookwhenIhavetime.Now，I'mgoingtosleep.Goodnight，everybody！
****文体分割线****
郑真秀收起用一打白纸与细线捆成的日记本，吹熄了灯，躺到了床上。
闭上眼，间或地，他听见从隔壁飘来的哭声。
啧！郑民只是去打仗了而已，又不一定会死，当心个啥？睡觉，不管她的！
郑真秀如愿以偿地陷入了沉睡了。
****场景分割线****
“郑民！”
黎明时分，一个全身穿着铠甲，骑在马上的人注意到了队列中和其他人一起急行军的郑民，他喊住了郑民。
“在！”郑民觉得这声音有些耳熟，却想不起自己在什么时候听过。他应该是不认识这样的高级将领才对。
“哟，还真是。”骑在马上的人看着因为自己的呼喊而走出队列的人，目光很是晦涩。
但昏暗的光照不出他的表情，这个小小的区域内只有一个貌似平和的声音在回荡：“郑民，我看着你一表堂堂的，很是个可造之材。就这么和那些普通士卒一样当个冲锋陷阵的小兵，太过委屈了。我想把你安排到董丞相那里，当他的近卫和副手，不知你意下如何啊？”