The outcome of the US mid-terms is unlikely to have any impact on Sino-US relations. For one thing, Donald Trump has already declared that it was a great victory for him, never mind that the Democrats seized the House of Representatives and flipped a number of key elections for state governors. The Democrats are also likely to be as tough on China as the Trump administration. Most Americans shrugged off the impact of the tariff war, which was not an election issue.
Fortunately, there are signs that China and the US may be working towards a settlement of their trade