The Son of Heaven's internal treasury is also located within the Qi Palace, and is considered a critical area.
The yellow-tier Dao Technique bestowed upon Zhongxuan Zun was directly taken out from the internal treasury and given to him, whether it is suitable or not is hard to say. Zhongxuan Zun himself indeed does not lack powerful Dao Techniques.
However, Jiang Wang's yellow-tier Dao Technique allowed him to personally go to the internal treasury to choose, so he naturally took great care in selecting the most suitable one.
Dao Techniques are generally divided into four ranks and twelve grades, covering all stages of Dao Techniques before reaching the God Descending Realm.
Dao Techniques that transcend the four ranks and twelve grades are further divided into four levels, known as Heaven, Earth, Mysterious, Yellow.
From this perspective, one can see that there indeed exists a huge gap before and after reaching God Arrives.