What is the fine-grained topic of the following text: Chinese City Nanjing Launches $1.5 Billion Blockchain Fund: Nanjing, the capital of the Chinese province of Jiangsu, has launched a CNH 10 billion (USD 1.48 billion) blockchain investment fund to promote the token economy and public blockchain projects. Only return the topic.
Nanjing's launch of a $1.5 billion Blockchain Fund