Fang Qin was selected by the Jinghai Army.
Although Fang Qin's selection had a lot to do with Fang Mu, it was not solely because of Fang Mu.
Even without the relationship with Fang Mu, a disciple of the Grandmaster Creator, Fang Qin would still stand out amongst his peers in the Jinghai Army during the selection process based on his Frost Tone Snow Dragonling and Cangluan Ying Jiao.
The Jinghai Army was selecting disciples for the "Dragon Mother".
If Fang Qin's ability did not meet the standard, the Jinghai Army would not dare to forcefully recommend Fang Qin to the "Dragon Mother", even if it meant gaining Fang Mu's favor.
The "Dragon Mother" learned about Fang Qin's abilities and his two Guardian Beasts from the reports of the Jinghai Army, but she did not know the specific skills and exclusive features of his two beasts.