What episode ended when Hua Xu quoted Song Ning?

Hua Xu's quotation of Song Ning is the end of his life, ending in episode 20, and Song Ning died in episode 19. Episode 20 Plot content:

Shen An came to the bedroom to say goodbye, and then went to Zheng. The bedroom remains the same. Qing Er comes to clean every day. Shen An looked at Song Ning's shirt and seemed to see Song Ning practicing and smiling at him. His voice and smile are still there, but his heart is just two boundless.

When he came to the battlefield, Shen An fought bravely with the enemy with the heart of death. He was invincible and finally died in battle. When he fell down, Shen An seemed to see Song Ning riding a horse to meet him, and a pair of bitter lovers could finally reunite forever.

Extended data:

Song Ning's ending story: Two people pass by a cave to keep warm, and they find Song Ning and Shen An in it. The plot develops to the place where Song Ning takes off his coat and hugs Shen An for warmth. Jun Fu just dodged for a while, then found that they had left, and found Song Ning after chasing the inn.

Junmai boasted about his future life. If Song Ning later saved Shen An for her, Song Ning said that she had fallen in love with Shen An, no matter how she finally decided to go. Jun Jun saw that Song Ning had decided to give them a happy ending.

Song Ning and Shen An can't be alone. Then in June, Su Yu hoped to postpone it, so that Ning Ge could stay in the hotel and take care of Shen until his eyes came back to light. Shen Yi opened his eyes and saw Song Ning. They love each other and hug each other tightly. Jun Jun and Su Yu watched the illusory happiness they weaved for Song Ning in the inn, not knowing the joys and sorrows. Suddenly, Song Yan came, and Jun Jun and Su Yu escaped from their fantasies.

At this time, Song Ning left this world with a smile in the deep sleep of the real world. After Shen An learned the news, he was in agony with Song Ning. At this moment, Rongmin came over and gave him a slap in the face. She told Shen An that Mao was a toll collector from beginning to end, and Shen An finally denied the last person he should deny.