Company brand research: based on the perspective of investor relations analysis and research based on the perspective of energy efficiency Marketing theories based on the perspective of relation 并列题名：Marketing theories based on the perspective of relation research based on the perspective of participant behavior analysis based on the perspective of intellectual styles a theoretical and empirical research based on the perspective of absorptive capacity an approach based on the perspective of entrepreneurial innovation China's tax burden research, based on the perspective of economic growth and income distribution study based on the perspective of enterprise valuation