I noticed earlier that this article has several inconsistencies, not least that 130/120 = 1.083.  And, 8.3% is not that much less than their growth rate.
Yes, BP statistics show an average 2% growth of the Chinese domestic oil production during the recent years. The share of domestic oil of consumption is falling anyway. The Chinese may try to curb the demand of oil, and they may be even successful in this, but the Chinese economic growth is so high that it makes the demand go up anyway.