It can be changed. The subscription period is determined by the Articles of Association, so it is necessary to modify it from the Articles of Association. If the deadline expires and the payment is not completed, you want to extend the deadline; Or in the process of operation, if you want to increase the subscription period, you need to amend the Articles of Association.
Article 1173 of the Civil Code, if the infringee is at fault for the occurrence or expansion of the same damage, the liability of the infringer may be mitigated.