Gu Shan desired to make connections with Deputy Chief He and his associates through Su Shen. Therefore, despite the anger boiling within him, he swallowed his pride and refrained from causing a scene.
He could tell that Su Shen had taken a liking to Gu Zi. If he could get Gu Zi to attend the wedding banquet, Su Shen would surely come as well, providing him with a reason to invite Deputy Chief He and his associates.
Gu Shan had initially planned to go to the village to personally invite Gu Zi and Su Shen. However, an unexpected encounter with Gu Zi made him decide to hand her the invitation on the spot, saving him the trouble of a separate trip.