Su Liang thought about it seriously.
It was natural for Gu Ling to have changed since they first met, mainly due to her influence as a transmigrator. He had been diligently learning about various aspects of Su Liang's previous world, including etiquette, language habits, and how people interacted with each other. Most of the changes were reflected in his interactions with Su Liang, while in front of others, there wasn't much difference from before.
The reason they started shaking hands and hugging was because Su Liang took the initiative to shake hands, saying it was a habit from her previous life when friends met. Gu Ling even asked her how many times they should shake hands.
