Is it necessary for two people to take two 20-inch boxes to avoid breaking them?

If you travel now, personally, it is unnecessary. In summer, there are few accompanying clothes, and it will be cumbersome to bring too many. However, if you are shopping in Japan, Korea, Hongkong and Taiwan Province Province, I suggest you take it. Last week, I stayed in Japan with Lv's delegation for five days, and I didn't buy much. A small suitcase is enough.