First of all, to answer your first question, China didn't actually join the WTO as a developed country at that time (it is written in the treaty, but many mainstream trading countries still don't recognize our status as a complete market economy), but others actually want you to pay more, on the one hand, to get more benefits, on the other hand, to slow down your development process. Those two upstairs are right. We should make clear the difference between the total and the average. If I were you, I would add purchasing power as the basis.
Secondly, to answer your second question, after years of negotiations, China finally joined the WTO at the expense of many interests. For example, it allows many foreign products to enter our market with huge tariffs as a guarantee, which impacts our traditional industries (labor productivity and cost far exceed ours). Moreover, we have been dumping products to developed countries by taking advantage of the low labor cost, while foreign countries deliberately added some overlord clauses in our accession treaty in those years, which laid the groundwork for suing China for anti-dumping in the future (the evidence can be concentrated in the previous "tire case", "steel pipe case" and "rare earth case". ), all these make China's import and export face severe challenges. We continue to pay huge natural and human resources, but we have enriched the developed countries and harmed their inherent interests.
I remember when China joined the WTO, some economic oligarchs in the United States and the European Union once said with emotion: "The advantage is the moon, and China people have finally been fooled. In the next 200 years, they will have to succumb to the control of Europe and the United States and will not turn over. "
Indeed, China was mighty in ancient times for more than 1000 years, but now, I'm afraid it will return its dominance to Europe and America for more than 1000 years. This is philosophy, the wind and water turn!