GF SECURITIES·2026-03-06 11:34Investment Rating - The report maintains a "Buy" rating for Tunnel Shares and Weixing New Materials, indicating a positive outlook for these companies in the underground pipeline construction sector [4]. Core Insights - The underground pipeline construction industry is experiencing accelerated growth due to government policies and significant investment needs, with an expected construction and renovation of over 700,000 kilometers of underground pipelines during the "15th Five-Year Plan" period, requiring more than 5 trillion yuan in new investment [12][13]. - The industry is transitioning from a focus on "laying pipes" to "maintaining and smart management," emphasizing the need for modernization and upgrades of existing infrastructure [13][16]. - The investment opportunities are concentrated in three main segments: engineering, pipe materials, and operation and maintenance services, with specific companies recommended for investment in each segment [30][31][32]. Industry Situation - The total length of urban pipelines in China is projected to reach 3.78 million kilometers by the end of 2024, with significant increases in investment and construction during the "13th Five-Year Plan" and "14th Five-Year Plan" periods [12][14]. - The report highlights a 78.2% increase in new urban pipelines during the "13th Five-Year Plan" compared to the "12th Five-Year Plan," with a 52.3% increase in related fixed asset investments [12][14]. Market Review - The report identifies six major market trends in the underground pipeline sector from 2015 to the present, driven by policy changes and significant infrastructure projects, including the establishment of the Xiong'an New Area and the recent issuance of 1 trillion yuan in special bonds for urban drainage and flood control [22][23][27]. - The performance of pipe material companies has shown strong correlation with these policy events, with notable stock price increases during key periods of policy announcements [22][27]. Investment Recommendations - In the engineering segment, Tunnel Shares is recommended for its strong cash flow and involvement in large-scale urban renewal projects [30]. - In the pipe materials segment, companies such as China Liansu, Weixing New Materials, and Qinglong Pipe Industry are highlighted for their market leadership and growth potential in municipal projects [31][32][33]. - The report also emphasizes the importance of digitalization and smart operation in the maintenance segment, with companies like Zhengyuan Geospatial and Chen'an Technology being noted for their innovative solutions [30][32].