How to choose two subjects of electrical engineering? Which is better, motor design foundation or power system transient analysis?

1, power system and its automation: power market, power system operation and control, power system stability and control, application of artificial intelligence technology in power system, power system optimization, distribution automation system; Motors and electrical appliances: design and new cooling technology of large generators, theory, operation, monitoring and diagnosis of large motors, motors and their intelligent control systems, theoretical analysis and numerical calculation of internal physical fields of motors; Power electronics and power transmission: power quality improvement and power signal processing technology, special power supply research, power system signal detection and electronic protection of power equipment, intelligent control system, power transmission and control technology, control theory and application in power electronics and power transmission, on-line monitoring of large electromechanical equipment;