“Freedom of a different kind” referred to the free will–free from the limits of convention and the free choice of presenting styles. Undoubtedly, Yu was never contented with his present achievements and would continue his pioneering exploration on arts. The keen attention to the real world always remained his motivation for painting, while his approach of representation kept changing from time to time. Yu has kept following this mode of composition for a long time, yet he managed to reach a higher level at every time.