If the company requires all employees to attend, then you have no special circumstances not to go, that is, there is no organization, no discipline and no collective concept. In this case, although the company will not fire you, it will definitely have a certain opinion of you. If there are layoffs in the company in the future, you must be the first person to be fired. If there are no special circumstances, you can participate in group activities or try to participate, and don't be special.