After his classroom studies, Bi Bi continued his music lessons at home. Pointing to the five lines, his teacher asked Bi Bi:

- What are these?

- Um... um... um... Music staves.

- Correct, but your recall is a bit slow. You need to memorize more to remember quickly!

- Yes!

- What else appears at the beginning of the staff?

- A clef.

- Right, but which clef is this?

- G clef.

- Excellent. So, which note sits on the same line as the beginning of the G clef?

- It's the G note.

- Wonderful, you're catching on quickly.

- And what are these lines?

- They're lines.

- What about the spaces between the lines?

- They're music slots.

- It seems I'm learning music faster than words. So, to complete "Do," what should you add?

- Add a line through the middle of the D note.

- Now, let's try placing the notes. Watch as I put them in their proper positions for you to see.

- Okay!

Bi Bi quickly picked up the notes and arranged them on the lines below the staff.

- Re! Bi Bi carefully positioned the note just below the staff.

- Mi! Bi Bi attempted to place the note, but it kept fluttering about, refusing to settle in Bi Bi's grasp. It soared to the top line, seemingly ready to land, then darted to the middle, as if contemplating stillness. Confused, Bi Bi struggled to find the proper placement.

- Well, this E note seems quite stubborn. Please cooperate and follow along. Now, where's Do? Bi Bi correctly placed the Do note.

 - Where's Re? Bi Bi positioned the Re note accurately.

 - And where's Mi? Bi Bi placed the note on the final line, then chuckled:

- Remember? That's where the E note goes. Let's try again. Where's Do? Bi Bi placed the note directly on the Do position.

- And where's the Mi note? Bi Bi held the musical notes, feeling her hands tremble. The note playfully lifted Bi Bi's hand and soared above the staff. It teased:

- Are you planning to fly into outer space? Bi Bi retracted her hand, and the note returned to the staff's lines. It teased again:

- What's the matter? Do you want to take G's place? Try to find me. Bi Bi sat down, beginning to sniffle, tears welling in her eyes. The mischievous E note, teasingly:

- Ti ti ti, billion billion billion. Step by step. It's true, Mi mi mi... Bi Bi Bi. I'm crying so much... But do you remember where I belong? The playful voice of the E note jolted Bi Bi awake. Bi Bi grasped the notes and placed them squarely on the bottom line of the staff:

- Here, this is your spot. Enough chattering. It's because you, E note, keep jumping around, not because of me! From that moment on, the musical notes obediently followed Bi Bi's hand and settled into their places. The mischievous Mi ceased teasing Bi Bi.

With note placement mastered, Bi Bi ventured to play the piano. Aligning the notes on the staff, Bi Bi expertly played the Do and Re notes. But when it came to the E note, Bi Bi's fingers veered toward the G note instead. It seemed this Mi character was too obstinate, refusing to cooperate. Bi Bi practiced repeatedly to adjust, especially with the E note. However, perhaps due to distraction, the notes danced, chiming out on their own to tease Bi Bi. "Tieu... tiu... tiu..." — the notes seemed to say "Hey... hey... hey...". Then "Tiu... tiu... tiu... tiu... tiu...", implying "Bi is struggling, very poor...". Bi Bi exclaimed:

- No more jesting! Bi Bi closed the piano and stood in silence. Tears streamed down once more, round and round like musical notes. 

Then, the tears began to fall rhythmically: "Mi Mi/ Mi Mi Mi/ Mi Mi Mi Mi...". Suddenly, Bi Bi recalled all the notes and sat back at the piano, playing the music flawlessly. Only the E note, representing Bi Bi, was played multiple times due to its stubbornness. Together, they sat at the piano, the sacred notes soaring.

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