As Zhang Wei continued to travel with the young guardians, they began to realize that their age and strength were not what they used to be. They knew that their time as a guardian of knowledge was coming to an end, and that it was time to pass the torch to the next generation. Zhang Wei began to focus more on imparting their knowledge and skills to the young guardians, teaching them everything they knew about martial arts, meditation, and the secrets of the universe. They knew that these guardians would carry on their legacy and continue to defend the realm long after they were gone. As they traveled together, Zhang Wei watched with pride as the young guardians grew stronger and more skilled. They saw themselves in these guardians, and knew that they had found worthy successors to carry on their work. But even as they prepared to step back and let the young guardians take the lead, Zhang Wei remained ever-vigilant. They knew that the realm was constantly changing, and that new threats could arise at any time. They would always be ready to lend their knowledge and expertise to those who needed it. In the end, Zhang Wei knew that their legacy would be secure. The young guardians would carry on their work, and the realm would continue to thrive and prosper. And even as they passed the torch, Zhang Wei would always be remembered as a true guardian of knowledge, a defender of the realm, and a mentor to all who sought wisdom and guidance.