C79 Primary involvement of constant-finger

Ceng Yanyun was a little puzzled in his heart. He remembered that the things he knew in his previous life only started to become popular at the end of the nineties. Could it be that he remembered wrongly, or the information on the internet was wrong?

He didn't expect that the manager of the company would be a foreign beauty. She was in her thirties, wearing a grey woman's suit