The name of the First Prince in Joy of Life is unknown.

In Joy of Life2, the Great Prince was summoned back by the Qing Emperor and married the Great Princess of Northern Qi, making him Prince Heqing. The First Prince led the army to the west and won. He also brought the daughter of the leader of the Western Hu tribe, Ma Suosuo, back to his residence. However, the Great Prince did not cherish Ma Suosuo. He sent her to Baoyue Brothel in Jiangnan for Fan Xian to take care of. As for the plot of the eldest princess, the search results did not mention the specific plot development.
The Crown Prince in Joy of Life was not the First Prince. The Qing Emperor had a total of five sons. The Great Prince's name was unknown. The Crown Prince was the Qing Emperor's eldest son, but he was not among the princes. Thus, the Crown Prince was not the First Prince.
According to the information provided, the Crown Prince in Joy of Life was not the First Prince. The Crown Prince was older than the Eldest Prince. The Crown Prince was conferred the title of Crown Prince the moment he was born and was not in the Prince Sequence. The First Prince's mother was not the Empress. Therefore, it could be concluded that the Crown Prince of Joy of Life was not the First Prince.
The Crown Prince of Joy of Life was not the First Prince. According to the information provided, the Qing Emperor had a total of five sons. The Great Prince's name was unknown. The Crown Prince was the Qing Emperor's eldest son, but he was called the Second Prince in the ranking of princes, not the Great Prince. Therefore, based on this information, it could be concluded that the Crown Prince of Joy of Life was not the First Prince.
The eldest prince in Joy of Life was not the crown prince. The Crown Prince was the Qing Emperor's eldest son, but he was called the Second Prince in the ranking of princes, not the Great Prince. Therefore, the First Prince and the Crown Prince in Joy of Life were not the same person.
The Crown Prince of Qingyu was not the First Prince. The Crown Prince was the Qing Emperor's eldest son, but he was called the Second Prince in the ranking of princes, not the Great Prince. The First Prince's name was unknown. Thus, Crown Prince Qing Yunian was not the First Prince.
Crown Prince Qingyu was not the First Prince. The Crown Prince was older than the Eldest Prince. The Crown Prince was conferred the title of Crown Prince the moment he was born and was not in the Prince Sequence. The Crown Prince and the First Prince were different people.
The Crown Prince of Joy of Life was not the First Prince. The Qing Emperor had a total of five sons. The Great Prince's name was unknown. The Crown Prince's name was not mentioned, but he had the support of the Qing Emperor and some officials. Therefore, it could be concluded that the Crown Prince of Joy of Life was not the First Prince.
The Crown Prince of Joy of Life was not the First Prince. The Qing Emperor had a total of five sons. The Great Prince's name was unknown. The Crown Prince was the Qing Emperor's eldest son, but he was called the Second Prince in the ranking of princes, not the Great Prince. Therefore, the Crown Prince in Joy of Life was not the First Prince.