I don't know the name of the work about Han Yang's son in the underworld's Road to the Emperor. However, according to the knowledge I've learned from online novels, the main character's son isn't usually described in detail in the works because the main character's son isn't usually the main character. If you have any more information or suggestions, I will be more than happy to provide them to you.
I don't know which novel Han Yang's second son is in. However, I can tell you that Han Yang is a character in "Battle Through the Heavens". He is the father of the main character Xiao Yan.
The emperor's sons were usually called elder brother, prince, ziye, prince, or ziye.
Han Xin's son's name was unknown. Some documents mentioned that Han Xin's son changed his surname to Wei, but the specific name was not mentioned. Therefore, according to the information provided, I don't know the name of Han Xin's son.
This was because Road to the Emperor: The Summit of the Underworld was a fictional novel that had not been confirmed to be the previous novel. The author's inspiration came from historical events and characters, and on this basis, he constructed a unique worldview and storyline. If you want to understand the background and story outline of Road to the Emperor: The Summit of the Underworld, I suggest you read the original work or related online literature.
I can't confirm the name of the underworld novel that you're referring to. Please provide more context information or specify the name of the novel you are referring to so that I can better answer your question.
The emperor's second son was called Yin Xi.
Emperor Kangxi's second son was called Yinreng.
Yang Xiaoxiong was the screenwriter of " The Emperor of the Han Dynasty."