The prince in Joy of Life was called the second son. Even though the Crown Prince was the Qing Emperor's eldest son, because his mother was not the Empress, he was independent in the ranking of princes and was called the second. The Eldest Prince was the oldest, while the Third Prince was the youngest. The exact age was not specified, but it could be inferred that the Second Prince was slightly older than the Crown Prince. Therefore, the prince in Joy of Life was ranked second.

Zhang Haowei, who played the Prince of Joy of Life, was born on June 18, 1991, so he was already 30 years old this year.
The ages of the Crown Prince and the Second Prince in Joy of Life were not specified. Therefore, it was impossible to determine the ages of the Crown Prince and the Second Prince of Joy of Life.
In Joy of Life, there was no clear information about Fan Xian and the Crown Prince's age.
Fan Xian was younger than the Crown Prince and the Second Prince. The exact order of age was the Great Prince, the Second Prince, the Crown Prince, Fan Xian, and the Third Prince.
Fan Xian was the Qing Emperor's illegitimate son. His age was not explicitly mentioned. The Crown Prince was the Qing Emperor's third son, and the Second Prince was the Qing Emperor's fourth son. The search results did not provide any specific information about their ages. Thus, it was impossible to determine the ages of Fan Xian, the Crown Prince, and the Second Prince.
There was no mention of how Joy of Life's crown prince was demoted.
The Crown Prince's strength was very powerful during the Qing Dynasty. Even though he pretended to be dumb on the surface, he was secretly cultivating his own zhenqi and possessed strength that was not inferior to the Qing Emperor's. Through his painstaking training of martial arts manuals and the Qing Emperor's blood in his body, he successfully became a ninth-level expert. However, the specific strength level was not clearly stated. Therefore, the Crown Prince's strength was described as powerful in the Qing Dynasty, but no specific details were provided.
Joy of Life's Prince ended up committing suicide. After the Qing Emperor learned of the relationship between the Crown Prince and the Eldest Princess, he abolished the Crown Prince's position and placed the Eldest Princess under house arrest. After the Eldest Princess failed in her attempt to assassinate the Qing Emperor, the Crown Prince and Eldest Princess chose to commit suicide. Therefore, the Crown Prince did not become the Emperor.
Joy of Life Prince's ending was suicide. The specific chapter information was not in the search results provided, so it was impossible to determine the specific chapter of the Prince's ending.
Joy of Life's Prince's suicide took place in the sixth volume of the novel, and the specific chapter information could not be determined. In this plot, the Crown Prince persuaded the Eldest Princess to sacrifice herself in exchange for peace in the Crown Prince's family and prevent war from breaking out. The Crown Prince's ending was suicide. After the Qing Emperor learned of his relationship with the Eldest Princess, he abolished the Crown Prince's position and placed the Eldest Princess under house arrest.