TikTok owner ByteDance on Wednesday released an update to its flagship AI model as a global race intensified to create AI models capable of tackling complex problems.

TikTok parent ByteDance is asking Chinese employees at its Singapore headquarters to pay tax to their home country or risk losing their ability to cash out on stock options, as Beijing steps up enforcement of its global tax scheme.

But the model is only meant to be used within China’s mainland, a ByteDance spokesperson told TechCrunch. The e-reader’s China-based manufacturer, Onyx International, which sells Boox e-readers in both China and to the U.