There is no N, and then a gu sound.

没有 N，然后是/gu/的音。

Then, practice it in typical positions where you're more likely to produce it with a gu sound.

然后，在典型的位置练习，这样你更有可能发出/gu/音。

But all the humans heard was this, " Uga boong-ga goog-ga gu! "

但所有人类听到的都是这个，“Uga boong-ga goog-ga gu！”

Playing gu qin can purify the soul.

弹古琴可以净化灵魂。