Guide to the design of rural highway in Guangdong province Budgeting methods for maintenance of rural highway in Guangdong Province 并列题名：Budgeting methods for maintenance of rural highway in Guangdong Province discuss in the unbalance of birth sex ratio in Guangdong province Picture album of the intangible cultural heritage in Guangdong province based on the mixed research in Guangdong province Guide of design standardization for highway engineering in Guangdong province Study on the high-quality development of rural industries in guangdong province Guidelines for the cost of soil remediation projects in Guangdong province research on the process of urbanization in Guangdong province