It is recommended to buy "Diandian" first.

"5.3" is more difficult. It combines typical college entrance examination questions with famous simulation questions, makes detailed analysis and short answers, and then refines the knowledge points according to the teaching materials. But you can buy 5.3 later.

One more thing. 5.3 Pricing: ￥49.00

Dialing price: ￥ 18.00

It's cheaper to call. ......