Either will probably work, depending on your location the climate might favor a 10w30 more and it may be easier to obtain than 5W-20 there.
Is your Focus a newer model or older, and how many km does it have? A 10w30 also may be more suited to an engine with some wear (80,000 km or more on it) than the thinner 5W-20.
I really don't know much about cars or oil on the Chinese market, other than what Sinopec makes and that Shanghai GM sells a ton of Buicks there.