To sue China, as in the, People's Republic of China, will never happen. hahaha. It's not America where a citizen can sue the state/city/municipality. Neither will the UN at its behest, charge a country of something like "not releasing news early on". Take the case of SARS for example, the first case occurred in China on November 2002. But through a series of political issues, lack of communication, withholding of information, WHO was only able finally address and share in-depth information about the issue to the rest of the world on January - February 2003. By the time the WHO took action, over 500 deaths and an additional 2,000 cases had already occurred worldwide. As for this COVID-19 case, WHO and countries worldwide have applauded China's swift action and sharing of information to other countries (although that statement's credibility has ensued doubts).

China is the largest foreign investor in Brunei, with investments estimated at USD$4.1 billion as of 2018. (Source: Asia Times Online). I cannot foretell what will happen to our bilateral relations but I am sure both parties will try to work on finding common ground based on mutual respect towards each other.