In DGSD, Jiumozhi gently spoke to Shaolin in the famous "next to you" manner.
This requires an extremely pure internal energy.
Jiumozhi was only in his 40s, how could he have cultivated such pure internal energy?
Earlier, when Jiumozhi spoke at the Celestial Dragon Monastery (CDM),
it was not noted that his voice sounded gentle.
In the 3rd ed, we learn that Jiumozhi at that time
had NOT learned Xiaoyao Pai's Xiao Wuxiang Gong yet (Little Formless Skill).
I believe the Little Formless Skill is what gave Jiumozhi such a pure internal base.
In the Trilogy, only Yideng was able to gentle talk like Jiumozhi,
and Yideng was more than 2x Jiumozhi's age.
The other person whose internal was very pure is Zhang Sanfeng,
and he is almost 3x Jiumozhi's age.
For Jiumozhi to have cultivated such a pristine pure internal base by age 40-something,
is really quite a feat.
Anyway, although we cannot say that Jiumozhi with his own Tibetan internal energy
definitely did not have a high purity, I do think that he was not capable of
gentle-talking at the time of CDM incident yet.
Because when he entered CDM, the circumstances were almost exactly the same
as that of Shaolin. He went to challenge both of them.
It would make sense that if he could do gentle talking at CDM, he would have.
More importantly, we see that when he gentle-talked at Shaolin,
he used Little Formless Skill to transmit the voice.
This confirms that Little Formless Skill is the essence of Jiumozhi's internal purity.
Jiumozhi practiced Little Formless Skill for less than 1 year,
and he reached the stage of divinity in internal purity.
Li Qiushui has practiced Little Formless Skill for 70+ years.
If her internal is not at least a few times purer than Jiumozhi,
I would have to say that she's an idiot (which we know she's not).