Wang Zhong basically spent the next four or five days of cultivation either consolidating his Soul Core or in a coma. As he repeated the cycle, his speed of recovery was faster and faster. As he delved deeper, Wang Zhong's control became stronger, and his mind wasn't as dazed anymore.
In essence, according to Cellular Cosmology, being able to return to reality after going into the microscopic world was just the basics. The important thing was to be able to maintain his consciousness. If Wang Zhong couldn't do that, what use was it even if he could enter the microscopic world?
Once again, it was proved that Cellular Cosmology was right. As Wang Zhong delved deeper, his mind wasn't as groggy, and he could maintain his consciousness to a certain degree. However, he still needed to practice more to hone his skills. Perfection couldn't be achieved overnight.