What was the major technological development of the Sui dynasty?

building the Great Wall

building the Grand Canal

building the Forbidden City

building the Great Buddha

The major technological development of the Sui dynasty was the building of the Grand Canal. The correct option among all the options given in the question is the second option. This canal improved the trade and communication during that time as it connected the north to the south. The block printing was also invented during the rule of the Sui Dynasty. It was used as a means of type setting up to the early 19th century. The Sui Dynasty ruled for a very small period of time.