This is like a choice between the devil and the deep blue sea. Or better, between the scoundrel and a demented old man. What kind of choice is this? This is the best of American democracy, when the Americans are supposed to choose two of the most capable men to be their president, to lead their country. Instead, they are forced to choose two of the most unsuitable men that would lead them to history. One would lead by cheating, swearing and sleeping around. Another would lead by being led by whoever is handling him, holding his arm so that he does not fall or what into the wrong place.
Is this a political system that would throw up the best man to lead a country? Who would think this is the ideal political system, the best in the world, the best of a country? In reality, this is fake democracy, a political system that fails miserably for what it intends to do. One man one vote, not for the best man or woman, but a dud chosen for them by the mafia, or a corrupt gang of men and women in Washington, that were paid to do what the paymaster want them to do.
Who would China prefer? It does not matter really. China can live with either of them as they would mean nothing to China. They would in their own way expedite the decline of the dying American Empire by their thoughtless policy made like knee jerk reactions. No need much thinking, just good for the day. After all they only have 4 years to fill their pockets and bank accounts.
China does not need to bother whichever clown becomes the President of a decadent Empire. China only needs to chart its own progress carefully with long term plans for the well being of its people and country.
Good luck to Biden and Trump. Good luck to fake democracy America and the daft American hillbillies.