1. Party School of Shandong Provincial Committee of the Communist Party of China (Shandong Administration College), Jinan 250014, China
2. The Research Center of Theoretical System of Socialism with Chinese Characteristics in Shandong Province, Jinan 250014, China
3. Department of Mathematics, Government College University, Lahore, Pakistan
4. Department of Mathematics, University of Okara, Okara, Pakistan
5. Department of Construction Management and Real Estate, Chongqing Jianzhu College, 400072, Pakistan