You can go to Joyo. Com, it saves time and effort than going to the mall, and the price is basically around 3-8 fold.

How to shop in Qiyou? Com, please refer to the following post: (graphic explanation)

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After registering and logging in, search for "Yoga Ball". It's not that big, only about 70cm.

It is safer to deliver goods first and then pay in big cities. At present, the actual payment exceeds that of 49 yuan, which can save the express freight in 5 yuan. Joyo. Com is a regular website, which can issue invoices. Depending on the inventory situation, it will be received in about 7 days.