He might face different types of chakra and powers that he's not used to. In a new dimension, the laws of nature regarding ninjutsu could be completely different. For example, his Shadow Clone Jutsu might not work as effectively if the chakra in that dimension behaves in an unexpected way. Also, he could encounter new and strange creatures that have abilities he has never seen before, making it difficult for him to fight or even communicate with them.
Chapter 622, "Actually Tie Her Up?!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. It opens with Watching the uncommon expression on the man's face, Su Yinwan was... and closes on Su Yinwan, pale-faced, struggled fiercely, but the vines were....
Chapter 247, "Madam, Your 2000 Kilograms of Sweet Potatoes, Please Check and Accept", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 766, "Young Master Gu, Please Come Inside!", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event.
Chapter 509, "Don't Cry Funeral Until Someone Dies", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. Early on, Because of the commotion from the night before, Jiang Li had....
Chapter 554, "I've calculated it, he won't die", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Just ahead, there should be a substantial source of water," Jiang Li....
Chapter 463, "Even if it's a Wild Boar, I'm Willing!", is the clearest early answer because it turns Willing's situation into a concrete plot event. Early on, The evening glow gradually bathed Dragon Ridge Island in a dazzling.... By the end, [What??] [Looking for a wild boar??.
Chapter 666, "It Really is His Mom!", is the clearest early answer because it turns Taiqi Entertainment's situation into a concrete plot event.
Chapter 713, "Uncle Will Owe You for Life", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li raised her head and was startled by Zhao Lang's smiling eyes.
Chapter 619, "The Feast of Fish CP Is Indeed Real!", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The storm grew fiercer until, at last, even the live broadcast had to...
Chapter 376, "I'm Just Afraid You Don't Need Me Anymore", is the clearest early answer because it turns Jin Siyue's situation into a concrete plot event. The chapter gives readers a real answer by opening on The phone call fell into a long silence.