Do companies that handle overseas registration and taxation belong to the financial industry?

Belong to. Financial industry refers to a special industry dealing in financial commodities, which refers to banks and related fund cooperatives, as well as insurance industry. Except for industrial economic behavior, everything related to the economy is the financial industry. The financial industry is a special industry dealing in financial commodities, including banking, insurance, trust, securities and leasing. Companies that handle overseas registration and taxation are securities companies, so they belong to the financial industry.