Stocks @ Night is a daily newsletter delivered after hours, giving you a first look at tomorrow and last look at today. Sign up for free to receive it directly in your inbox. Here's what CNBC TV's producers were watching as the S & P 500 retreated from its record, and what's on the radar for the next session. President Trump's trip to China The iShares China Large-Cap ETF (FXI) is down 11% from the October high. The ETF has gained 3% in the past month. The iShares MSCI China ETF (MCHI) is off 13.6% from the high hit back in…