The impact of the tariffs on China's economy may be being overestimated. It still has large markets all across the world, and has diversified enough of its manufacturing to allow it to weather the brunt of the war.
While China may be badly hit, the same is true for the US, which relies on its cheap consumer and industrial goods. Rather than China being the first to break under the pressure of sanctions it may be the Trump administration, under the pressure of rising prices that impact Trump's key constituents. China has the very real potential of outlasting the US in this trade war.