★1991: The "Shihua" trademark was officially registered with the Trademark Office of the State Administration for Industry and Commerce. ★1994: Shouguang Fengcheng Asphalt‑felt Factory, the predecessor of Shihua Company, was formally established. ★1998: Ranked No.1 in national asphalt‑felt sales, with an annual output and sales volume of 50 million square meters. ★2000: Following enterprise restructuring, Weifang Shihua Chemical & Building Materials Co., Ltd. was formally registered and put into operation. ★2003: The first high‑grade one‑step forming polymer polyethylene‑polypropylene composite membrane production line was completed and commissioned, marking the start of a new era for polypropylene‑polyethylene waterproof membranes. ★2005: The 4th composite membrane production line was put into production, lifting production capacity to the forefront of the industry. ★2007: Product portfolio upgraded; old asphalt‑felt production lines were dismantled. The company fully entered the era of new polymer materials. ★2008: The R&D Center was completed and commissioned, bringing new breakthroughs in technical capabilities. ★2009: The 8th polymer polyethylene‑polypropylene composite membrane production line went online, hitting a new record in output and sales. ★2010: Obtained three‑system certifications for Quality Management, Environmental Management and Occupational Health & Safety Management. Awarded the title of Shandong Provincial Famous Trademark. ★2011: Completed the upgrade of large‑span three‑dimensional steel‑structure workshop with an investment of over RMB 8 million. ★2012: Honored as Shandong Provincial Contract‑abiding & Credit‑worthy Enterprise. ★2013: Shihua products were recognized as Shandong Famous‑Brand Products. ★2014: The 12th new automated & intelligent polyethylene‑polypropylene composite membrane production line was commissioned. Annual output of composite membranes exceeded 300 million square meters, with products sold nationwide. The company’s first‑batch industry‑level Standardized Laboratory passed official acceptance. ★2015: Waterproof coating production line (annual capacity 27 million square meters) and SBS modified bitumen membrane production line were completed and put into production, launching Shihua’s diversification strategy. ★2016: Selected as Excellent Enterprise of China Polymer Waterproof Membrane and Top 20 Enterprises in China Building Waterproofing & Insulation Industry. ★2017: Awarded Shandong Provincial Hidden‑Champion Enterprise and Shandong Provincial Specialized‑Refined‑Differentiated‑Innovative Enterprise. The Standardized Laboratory passed re‑assessment. ★2018: Won honors of China Well‑Known Trademark and High‑Tech Enterprise. Passed China Ten‑Ring Green Certification. Butyl rubber membrane production line was commissioned. ★2019: Construction qualification upgraded to National Grade‑Ⅰ. ★2020: Self‑adhesive waterproof membrane production line was put into operation. ★2021: Re‑recognized as Shandong Provincial Specialized‑Refined‑Differentiated‑Innovative Enterprise. ★2023: Granted the title of Shandong Provincial Manufacturing Single‑Champion Enterprise. ★2024: 30th Anniversary of Shihua Waterproof. ★2025: Passed China Building‑Materials Green Product Certification.