According to custom, before the sacrifice to Heaven, the princes were required to fast to show their piety and reverence for Heaven and the gods. During the fast, the princes abstained from meat and women, maintaining the purity of their body and mind.

The Imperial Household Department and the Imperial Observatory selected sacrificial sites (such as the Circular Mound Altar in the Temple of Heaven), prepared sacrificial vessels (such as jade tablets and jade coins), and sacrificial offerings (such as livestock).

These ritual objects and offerings all require specific rituals for production and processing.

Preparation: including

Before the sacrificial ceremony to Heaven, Yinzhen underwent a series of rigorous etiquette training sessions every day before leaving court.

On that day, Yinzhen washed his body in advance and changed into specific clothes (such as wearing a crown and a dragon robe).

He led the other princes to line up in front of the altar of Heaven, arranged the sacrificial vessels according to regulations, and bowed to Heaven and Earth.

Reciting scriptures and offering prayers expresses reverence and supplication to heaven, earth, and the gods.

Slaughtered animals were offered as sacrifices to heaven and earth and placed on the altar.

At Yinzhen's instruction, the sacrificial offerings were burned.

After the sacrificial ceremony to Heaven concluded, everyone returned to the palace to participate in the evening celebrations.

Because the Fujin (Prince Consort) was confined to his quarters and the Nian Ce Fujin (Secondary Prince Consort) was about to give birth, Yinzhen only brought Li Jingshu into the palace.

Even though Nian Yunrong was dissatisfied, she could only endure it for the time being.

In the following days, Geng Youran got up every morning as usual and went to Yunrong's courtyard last year.

That day, she was preparing ingredients in the side courtyard when Qingyan ran over:

"Geng Gege, my concubine says she's in pain and might be about to give birth!"

"What? Didn't the imperial physician say a few days ago when he came to check on her pulse that she had about ten days left?"

"Oh dear, you should go and take a look!"

Geng Youran quickly put down what she was holding and hurried towards Nian Yunrong's side, asking as she did so:

Have the midwives arrived yet?

"They'll be here soon, and the imperial physician is on his way."

As soon as she reached the door, Geng Youran heard Nian Yunrong scream.

"If she keeps shouting like this, she'll lose all her strength!"

Geng Youran rushed in immediately.

"My lady, I'm here. Don't worry, I'm here."

"Gege Geng, it hurts so much!"

Nian Yunrong's forehead was covered in sweat, with stray hairs sticking to it, and her lips were bitten until they were bright red.

"Consort, bear with it, the midwife will be here soon. Listen to me, no matter how much it hurts, you can't scream. We need to save our strength for childbirth, understand?"