Hearing that words make Yin Yu shocked a little bit but not too much considering his mother specialty in the hidden weapon, poison, trickery, and how his mother can disappear into shadow as much as she wants, really make her as an excellent assassin.
Yin Yu feel his mother has become cooler and cooler in his mind to the point of worship while imagining himself as an assassin who can come and go without anybody noticing is cool which makes him ask his mother.
"Mom, can I be an assassin too?"
Having new aspiration, Yin Yu ask his mother if he's able to become an assassin too, even so, he feels his mother will agree since she may want him to continue her footstep, yet on the contrary, the answer he gets is.
"No"
"Why!?"
"Because an assassin who's always shouting when battling wouldn't make a good assassin at all."
Hearing that sentence makes Yin Yu dumbfounded but soon his expression normal again after a while. Yin Ying who saw every little detail of her son face changing at fast pace knew what he thinks of, but she just smiles and shook her head and say energetically.
"Alright, let's go back to training"
***
For the next few days, Yin Yu has tried and tried again to conceal himself well against the bunch of Redclimb Monkey. It's just that every single time, no matter how he tried to noiselessly moves, get out of those monkey sight, or using night as a cover, he always get found easily by these monkeys.
Why did he found out easily by them?
Yin Yu know it's because of the scent that comes from the beast guiding powder gave his position away, which makes him ponder how to conceal this scent.
Yin Yu has thought of changing his clothes before where the result is a failure, he has thought of using other scents to conceal his scent yet the only things smelly enough in this forest is mud, monkey feces and monkey blood for which Yin Yu was too proud to use it. He also has thought of washing his scent yet there's not even a water source like pond nearby.
'How should I do this…'
Without any good idea on how to conceal his smell, Yin Yu becomes troubled and start to think harder.
'This is a task that given by mother, which means mother thinks that I can complete this task, think me, think!.'
'With my wisdom of a king, I should be able to think of something!.'
While Yin Yu was thinking, he's also practicing his foundational body tempering which he can easily do even without focusing on it now. His movement seems natural now and it's not like the first time he practices it where all of his movement was crude.
Yin Yu keep practicing and practicing and soon, he can feel the power building up inside him and he achieved a breakthrough in the forest.
'8th stage of body tempering.'
Unlike his usual self where he will get happy when he achieved a breakthrough, Yin Yu really can't really feel happy right now, since he hasn't figured how to solve his problem.
With no choice at all, Yin Yu finally decide, he finally decides to throw his pride. To do what? to use mud all over his body? of course no you silly, he has decided, he has decided to ask his mother, for the solution.
With that, Yin Yu go to his mother location and soon he reached it and call her mom with a low voice.
"Mom…"
"What is it, Little Yu?"
Yin Ying becomes happy when she saw her son come to her outside of training time. She has a feeling she knows why he's here but decides to wait until her son let go of his pride to ask her about it.
"I don't understand one thing, how do I conceal my smell before I'm able to use qi with shadow step?"
Hearing that question, Yin Ying only smile and explain.
"Shadow step is a technique which emphasizes on concealment and not speeds, even so, shadow step can also be used for speed, but that's for when you have been discovered by your enemies"
"The past few days, you have tried to try to move as fast as you can, even if you can conceal your sound and hide from your enemies, you still get caught because of your scent."
"You said, you can't use qi right now since you're still in body tempering but you should remember that you can use the surrounding qi to enhance the effect even if it's only partial"
"Now I'll ask you little Yu, how do you think your scent travels and reach the monkey nose? once you figured it out, you'll be able to easily find the answer"
Thinking what his mother says, Yin Yu pause for a while and start to think seriously.
"How do scent travels...? it travels by… wind?… I get it!… Thank you, mom!"
Reaching that conclusion, Yin Yu feels like he knows where the problem lies. He starts to think for a while what his mother just said and figured what he can do to conceal his scent. Feeling that his problem is solved, Yin Yu thank his mom and start to go to try his method.
"Sheesh, that kid. At least hug your mom first before you go OK."
While muttering that under her breath, Yin Ying can only smile while shook her head watching her son go farther and farther away.
***
Yin Yu has finally know where his problem lies, although he moves as noiselessly as he can, he's disrupting the wind every time he jumps from tree to tree which makes his scent travel by the wind and reaches the nose of those Redclimb monkeys.
At first, Yin Yu thought that the beast guiding powder scent is the thing that gives his position away, which was why he tried to go as fast as he can. Because the beast guiding powder needs to be blown for it to work, he finally realizes all he has done until now was wrong. Which was why, he has finally figured out the way, the way to complete this test.
With no time at all, Yin Yu arrives in Redclimb monkey territory again but before he enters, Yin Yu start to wait in one of the trees until night falls.
Soon, night comes and under the cover of night, Yin Yu eyes can be seen changing from gray to dark blue color while looking silently at the direction of the forest.
'Redclimb Monkey King, I'm coming to you.'
With that said, Yin Yu start to depart once again into the forest under the cover of the night
So, I have read people ask whether Yin Yu is mature or not since he reincarnated and I'll explain!.
Yin Yu basically lost his memories when the robbery happens which makes Yin Yu only lives for 4 years on earth before he died and reincarnated into this world.
Yin Yu who is arriving in the new world, forget most of his memories after his burst of power which makes only some strand of memories left on his mind.
Which makes him a kid at heart and mind.
Hope that clarifies your doubt.