Is China index oversold?
I do not think so from both short term fundamental reason as well as trend analysis.
I expect the price to fall through the inner bullish trend line (dotted) and heads much further south.
To help support my chart, I use Relative Strength Indicator (RSI) to determine if it is oversold. You can see that it still has some room to move...
The current on-going trade war has pushed the Chinese market down. The GXC (China ETF), is still in a down-trend and may find support at 82. If it can hold 82, then it's a good long term buy at this level.