Xiao Zhen was kidnapped to Ling Mountain because he didn't resist, he didn't suffer much, it was just that his freedom of movement was restricted, and he was forcefully detained as a guest on Ling Mountain.
During this time, he hadn't seen the King of Ling Mountain, nor had he seen Prince Ye Rui.
He had long heard of the factional strife and internal struggles of Ling Mountain, but he had never witnessed them firsthand. This time being kidnapped to Ling Mountain, he had indeed experienced it.
He wasn't worried about losing his life; he was just always concerned that he had caused trouble for Ling Hua.
Although he didn't want Ling Hua to marry Yan Qing, he also didn't intend to deliberately sabotage her marriage. He knew Ling Hua's temperament — if he purposefully ruined her marriage and she found out about it, she would certainly not spare him, and then the decade of mutual support between them would be destroyed.