If it's a squeeze to slip the cardboard inside, fold it a bit. Don't worry, it will flatten out and will still be supportive.

如果放入时有点紧可以将它稍微折弯一点，放心它还会展开的，不会影响支持效果。

youdao

Cut spinach into small sections, parboil until cooked, squeeze to drain, then add into the minced pork, stir up to form stuffing.

菠菜切小段，烫熟，取出挤干水份，然后加进碎肉拌匀，成为馅料。

youdao

Cut spinach into small sections, parboil until cooked, squeeze to drain, then add into the minced pork, stir up to form stuffing.

菠菜切小段，烫熟，取出挤干水份，然后加进碎肉拌匀，成为馅料。

youdao