We can conclude that the Barrett sniper rifle in Joy of Life was used for the first time by Ye Qingmei. She used the Barrett sniper rifle to kill the two kings who were fighting for the throne. The specific time of use was not mentioned. Therefore, there was no clear answer to the usage time of the Barrett sniper rifle in the movie.

We can conclude that the Barrett sniper rifle in Joy of Life was used for the first time by Ye Qingmei. She used the Barrett sniper rifle to kill the two kings who were fighting for the throne. The specific time of use was not mentioned.
The exact number of episodes where Joy of Life used the Barrett sniper rifle was inconsistent. One document showed that the Barrett sniper rifle appeared in episode 28, while another document mentioned that the Barrett sniper rifle appeared in episode 150. Due to conflicting information, it was impossible to determine the exact number of episodes where the Barrett sniper rifle appeared in Joy of Life. Therefore, it was impossible to accurately answer the exact number of episodes Joy of Life used Barrett.
The Barrett sniper rifle in Joy of Life had been used many times. In episode 28, Fan Xian used the Barrett sniper rifle to kill the Qing Emperor's arm. Ye Qingmei also used the Barrett sniper rifle to successfully kill the Qing Emperor's two brothers and help the Qing Emperor ascend to the throne. In addition, Fan Ruoruo also used the Barrett sniper rifle to snipe the Qing Emperor. Therefore, the Barrett sniper rifle in Joy of Life was taken out and used many times.
The Barrett sniper rifle in Joy of Life had been used many times. Ye Qingmei used the Barrett Gun to kill the two kings fighting for the throne. Fan Xian used the Barrett Gun to kill the Qing Emperor's arm. Fan Ruoruo also used the Barrett Gun. Therefore, Joy of Life's Barrett gun was taken out and used.
The Barrett sniper rifle in Joy of Life had been used many times. Ye Qingmei used the Barrett Gun to kill the two kings fighting for the throne. Fan Xian used the Barrett Gun to kill the Qing Emperor's arm. Fan Ruoruo also used the Barrett Gun. Therefore, Joy of Life's Barrett gun was taken out and used.
The Barrett gun in Joy of Life had been used many times. Ye Qingmei was the first user of the Barrett. She had used the Barrett sniper rifle four times in Joy of Life. One of the times was when she helped the Qing Emperor ascend the throne and killed the two kings fighting for the throne. Fan Ruoruo also used the Barrett twice. Fan Xian had never used a Barrett gun before. In short, the Barrett gun in Joy of Life was taken out and used many times.
Joy of Life's Barrett sniper rifle was finally used. Fan Ruoruo had used the Barrett sniper rifle to knock off the Qing Emperor's arm in the final battle. In addition, Fan Xian, Wu Zhu, and Fan Ruoruo's last assassination attempt had barely killed the Qing Emperor. Therefore, the Barrett sniper rifle played an important role in Joy of Life and had an impact on the plot.
Joy of Life's Barrett was used in the end. Fan Ruoruo had used the Barrett sniper rifle to knock off the Qing Emperor's arm in the final battle. In addition, Fan Xian, Wu Zhu, and Fan Ruoruo's last assassination attempt had barely killed the Qing Emperor. Therefore, the Barrett sniper rifle played an important role in Joy of Life and had an impact on the plot.
Joy of Life's Barrett was the last to be used. Fan Ruoruo had used the Barrett sniper rifle to knock off the Qing Emperor's arm in the final battle. In addition, Fan Xian, Wu Zhu, and Fan Ruoruo's last assassination attempt had barely killed the Qing Emperor. Therefore, the Barrett sniper rifle played an important role in Joy of Life and had an impact on the plot.
Joy of Life's Barrett sniper rifle was finally used. Fan Ruoruo had used the Barrett sniper rifle to knock off the Qing Emperor's arm in the final battle. In addition, Fan Xian, Wu Zhu, and Fan Ruoruo's last assassination attempt had barely killed the Qing Emperor. Therefore, the Barrett sniper rifle played an important role in Joy of Life and had an impact on the plot.