Group 1 - The company, Donghua Testing (300354.SZ), is currently in the small batch trial production and partial market promotion stage for its multifunctional fiber Bragg grating (FBG) online intelligent monitoring system [2] - The FBG monitoring system can be used for monitoring physical quantities such as strain, temperature, displacement, and pressure [2] - The system consists of an FBG intelligent demodulator, FBG sensors, and transmission cables, supporting both series and parallel application modes [2] Group 2 - The applications of the FBG monitoring system include online monitoring in various fields such as aviation, shipping, nuclear industry, electric power, civil engineering, petrochemicals, offshore platforms, and coal mining [2]