C1073 Upgrading the Dao Comprehending Tower

After Qin Buyi spent five billion System Mall points, the system automatically cut off its connection with Qin Buyi.

This made Qin Buyi speechless. He thought to himself, "Are you so afraid that I will go back on my word?"

Looking at the remaining 2.51 billion points, Qin Buyi suddenly thought of the Dao Comprehending Tower.

"Forget it, since there are still so many System Mall points left