China market is huge, if you look at population statistics: 1.4 billion people, there is a lot of money backing that market size. Compare to only 340 million people in the US plus 745 million in all of Europe, it still exceeds by 315 million people. India has also 1.4 billion people but there are 21 main languages and over 121 total languages with 1,600 dialects. China is unified with only 1 main "Putonghua" language. Also GDP of China is 5 times higher than India.

Which market has the world's largest single language (Putonghua) after English? - China. Please focus on this market before the Chinese developers get a foothold, since there is more money to be made there quickly in the short term. And if you cannot get a foothold in the short term, there is no need to worry about any long term and not being the first to do Empathic voice agent market in China.