China is about 2,459 times bigger than South Georgia and South Sandwich Islands.

South Georgia and South Sandwich Islands is approximately 3,903 sq km, while China is approximately 9,596,960 sq km, making China 245,787% larger than South Georgia and South Sandwich Islands.
Tip: This to-scale comparison of South Georgia and South Sandwich Islands vs. China uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: China vs. South Georgia and South Sandwich Islands