The lion did want to withdraw at that moment, but before it could take any action, it discovered that Zhou Tian, its opponent, had already blocked its path. Given the situation, without a doubt, if the lion wanted to leave, it could not do so without defeating Zhou Tian first.
"Roar!"
Initially following the unspoken rules, upon discovering Zhou Tian's powerful strength, it chose to cease combat. However, this response did not mean the lion was afraid of Zhou Tian, it simply did not want to waste time on him. But now, intending to retreat, the lion found Zhou Tian still blocking its escape route, which made it very angry at that moment.
Since Zhou Tian was not willing to let it go, the lion simply became lazy about leaving.