它应自动无效，除非在该期间届满期限由当事人双方在写作。
It shall become null and void automatically at the expiration of that period unless mutually extended by the parties in writing.
保额自动递增，满期一笔领取，可作为教育金、养老金……尽享品质生活。
Automatically increase the sum insured, the expiration of a collection, payments can be used as education, pensions...... enjoy the quality of life.
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