Final answer:
Writing, Chinese dictionary, tree-bark paper, and acupuncture were inventions during the Han dynasty.
Step-by-step explanation:
The inventions during the Han dynasty included writing, a Chinese dictionary, tree-bark paper, and acupuncture. Writing was a significant development during the Han dynasty, as it helped in record-keeping, administration, and communication. A Chinese dictionary was also created during this time to document and standardize the Chinese language. Tree-bark paper was another important invention that replaced the use of bamboo strips for writing. Lastly, acupuncture, a medical practice that originated in ancient China, was further developed and refined during the Han dynasty.
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