Tunnel Co., Ltd. announced on December 24 that the board of directors of the company recently received the resignation report from Vice President Sun Guifeng. Sun Guifeng applied to resign as vice president of the company due to his retirement age. The resignation report took effect on the day it was delivered to the company's board of directors.

Tunnel Co., Ltd. announced on December 24 that the board of directors of the company recently received the resignation report from Vice President Sun Guifeng. Sun Guifeng applied to resign as vice president of the company due to his retirement age. The resignation report took effect on the day it was delivered to the company's board of directors.