Du Xiaokang had experienced a series of psychological changes in his life as a duck herder. At first, he would feel lonely and helpless because he had left his family and familiar environment to start a new life. But as he continued to adapt and work hard, he gradually felt confident and satisfied because he found that he could live independently and have many new experiences. At the same time, Du Xiaokang would also experience some psychological struggles and contradictions. He may feel that he is not used to the environment or that he is alienated from the people around him, which may lead to some negative emotions such as anxiety and depression. However, as time passed, Du Xiaokang would gradually realize his value and importance. He found that through continuous hard work and perseverance, he had achieved a lot, which made him more confident and determined. Finally, when he finally completed the "lonely journey", he would feel peace and satisfaction in his heart because he had passed a difficult period and gained growth and progress.