[求问]父母访问签证申请，机票、医疗保险如何提供？

lufthansa

check list 上要求包括如下两项：
0 Z5 @' c4 \& K9 J5 O4 ~: N# o1）Photocopy of your valid return ticket and/or travel itinerary, if applicable 因为只有拿到签证后才会购买机票，此项文件可否不提供？
3 _0 `: s0 g9 s; }2）Proof of medical insurance coverage for one year with a Canadian insurance company (copy of the insurance certificate or policy) 这一项材料大家一般是如何处理的？