C1620 Problems(part I)

1620. A Difficulty.

Guo Yi had just returned from participating in the assembly competition and was currently handling official business in his study.

Recently, Chen Fan found out that Guo Yi was already over 700 years old. This was probably the second oldest person Chen Fan had met.

The first was naturally the inner world master of the Acoustic Tide, Wen Tian, and Nameless