Final answer:
During the later period of the Han Dynasty, several infrastructural projects were built along the Chinese portions of the Silk Road, including the expansion of the Great Wall of China and the construction of the Grand Canal.
Step-by-step explanation:
During the later period of the Han Dynasty, a number of infrastructural projects were built along the Chinese portions of the Silk Road. These projects included the expansion of the Great Wall of China to provide additional protection, the construction of the Grand Canal to connect the Yellow and Yangtze Rivers for easier transportation, and the establishment of relay stations and imperial roads alongside the canal. These developments helped facilitate trade and communication along the Silk Road and contributed to the economic growth and prosperity of the Han Dynasty.