Abstract: An agent login method based on voiceprint identification, which belongs to a field of login authentication. The agent login method includes receiving login request information initiated by the agent, wherein the login request information includes unique identification information identifying agent identity, verifying whether the agent is a registered agent through the unique identification information, if so, then randomly generating identity review information and providing it to the agent, and prompting the agent to read the identity review information by word-by-word prompt with color changing at constant speed, receiving voice information of the identity review information, and performing voiceprint login verification on the agent according to the received voice information.

Abstract: A preparation method of tetraboronic acid compounds includes mixing aldehydes with amines and dissolving them in a solvent to obtain a first solution, stirring the first solution, adding carboxylic acid and isocyanide to obtain a second solution, heating the second solution to obtain a first product, extracting and purifying the first product to obtain tetraboronate ester compounds, and executing a deprotection reaction on the tetraboronate ester compounds under heating by microwave to obtain a second product. The second product contains tetraboronic acid compounds, and the tetraboronic acid compounds have the structure as shown in formula (I).