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.

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.
In Joy of Life, there was no clear information about Fan Xian and the Crown Prince's age.
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.
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.
In Joy of Life, the Crown Prince and the Second Prince were two important characters. Their personalities and fates developed differently in the novel. Crown Prince Li Chengqian was the eldest son of the Qing Emperor and Empress. He had a gentle personality, but he was somewhat indecisive. He had always longed for his father's approval, but the Qing Emperor's attitude towards him was always lukewarm. In the novel, he was deposed by the Qing Emperor because of his affair with the Eldest Princess Li Yunrui and was eventually demoted to a commoner. The Second Prince, Li Chengze, was the son of the Qing Emperor and Noble Consort Shu. He had a firm and decisive personality and was ambitious. He had always tried to fight for the throne, but in the novel, because of his relationship with Fan Xian, he was seen as a threat by the Qing Emperor. In the end, he was plotted to be killed by Fan Xian. In the TV series, the characters and personalities of the Crown Prince and the Second Prince were also different. The Crown Prince was a gentle and somewhat weak person. He longed to obtain his father's approval, but he was always neglected by the Qing Emperor. The Second Prince was an ambitious person. He had been secretly plotting to seize the throne and had launched a series of struggles with Fan Xian and the others.
The First Prince, Li Chengru, had a lucky ending in Joy of Life2. He was not qualified to inherit the throne because of his impure bloodline, but he had no intention of fighting for the throne. He only wanted to guard the border and live a free and unrestrained life. In the end, he married the Great Princess of Northern Qi and became a henpecked husband. He left the Qing Kingdom and went to Dongyi to become an overlord. He even brought his wife and mother to live in seclusion in Dongyi and lived a complete life. As for the Crown Prince's ending, the search results did not provide any clear information, so it was impossible to know what the Crown Prince's ending was.
In Joy of Life, the Crown Prince and the Second Prince were brothers. The Crown Prince was the Di son of the Qing Emperor and the Empress, while the Second Prince was the Qing Emperor's younger brother. There was a complicated relationship between them, including cooperation and competition. The Crown Prince was being used by the Eldest Princess, while the Second Prince was cooperating with Li Yunrui and the others. In the end, the Crown Prince and the Second Prince committed suicide.
The Crown Prince and Second Prince in Joy of Life were the Qing Emperor's sons. There was a complicated relationship between them, including cooperation and competition. The Crown Prince was the Di son of the Qing Emperor and Empress. His status was high, but his power and ability were relatively weak. The Crown Prince's goal was to defend his position and keep the throne. He mainly relied on the Eldest Princess 'support. The Second Prince was the Qing Emperor's younger brother. His status was lower, but his ability and ambition were greater. The Second Prince took radical measures in hopes of attracting more talents to help him and cooperate with Li Yunrui and the others. However, the Second Prince was too radical. He ignored the Qing Emperor's ability and deep planning. In the end, he and the Crown Prince chose to commit suicide. Their fates revealed the cruel reality of power struggles.
In Joy of Life, the Qing Emperor had a total of five sons. Among them, the Great Prince's name was unknown. He was born from the Qing Emperor and Dongyi prisoners of war during the Northern Expedition. The Second Prince's name was Li Chengze, born from the Qing Emperor and Noble Consort Shu. The Second Prince was a tragic character in the drama. In the end, he chose to commit suicide by taking poison. The Crown Prince was the Qing Emperor's third son. He was portrayed in the play as a weak and incompetent person who lost everything in the end.