HONG KONG—An investment bank that has helped many Chinese technology startups raise capital is planning a stock sale of its own. China Renaissance Holdings Ltd., a boutique investment bank and money manager that advises and invests in mostly Chinese internet and “new economy” companies, filed an application Monday to go public in Hong Kong. The company didn’t disclose how much it plans to raise. Units of Goldman Sachs Group Inc. and Industrial and Commercial Bank of China Ltd. IDCBY -1.96%...

Blockchain is a digital record-keeping system that enables trading in cryptocurrencies and other kinds of financial transactions. Banks, financial institutions and businesses all over the world are trying to use the online-ledger technology to manage large volumes of data and speed up transaction processing. Mr. Ma said blockchain “must be used to solve data privacy, security and sustainability issues” but that with cryptocurrencies the technology has been turned into “tools and concepts for...