Absolutely not. Your comment is vague, but I assume you mean direct shipments from sellers in China to buyers in the US.
That's a completely different issue than the rates that the USPS charges US shippers to ship within the US.
We have been screwed for years by agreements established by the UPU (Universal Postal Union), part of the UN, which deems China to be a "developing country" and somehow their shipments have to be delivered essentially for free in the US. That's why you can buy an item for a dollar on eBay and get free shipping from China (their sellers are also subsidized by the CCP as a way to put US sellers out of business). That's been quite effective.
Theoretically, there are changes in the works that will happen in July 2020 but it's not immediately clear what the effect will be. Trump wanted to get the US out of the UPU completely, but he caved on that. A compromise was agreed to that kept us in the UPU. Hopefully, whatever was agreed to will put the screws to the Chinese suppliers.
I wonder if he caved or just used the negotiating tactic of asking for vastly more than you hope to get so you have room to bargain. Too often the US and the Republican Party start negotiations by proposing the absolute minimum that might be acceptable if everything goes right and then gives away from there. If the President said that we wanted to double Chinese postal rates, we would probably get a 10% increase with advertisements complaining about that.