The most hear broken episode

As the sub-title, my favorite character is gone forever. I hate Kuo Yuanji who killed Jin. I knew he couldn't be trusted, and even Jin said Kuo Y scared him. I don't think there is no way to bring back Jin at the end. He was poisoned by Kuo Y with the same poison to control Jin's mind to kill Yun. But Yun had antidote pills. So Jin ended up dying to protect Yun. This episode reveals why Prince F is being investigated by Commander Liu.