about us
Who We Are
KLEIN Intelligent Technology (Shandong) Co., Ltd. is dedicated to providing innovative door and window solutions that combine performance, design, and sustainability. We integrate R&D, manufacturing, and project services to deliver high-quality systems for modern architecture.
Our product range includes automatic and manual swing doors, revolving doors, sliding doors, aluminum alloy and UPVC windows, folding designs, shutters, and precision hardware. With multiple proprietary patents, KLEIN products are widely used in high-speed railway stations, hospitals, schools, commercial centers, and corporate campuses across China.
As a trusted partner for large-scale public and corporate projects, we offer complete solutions—from custom design and engineering to installation and long-term maintenance. Our focus on low-carbon technology and precision engineering ensures both reliability and energy efficiency.
With a strong nationwide service network and an expanding global presence, KLEIN continues to deliver smart, durable, and sustainable solutions that shape the future of building design.
More Than
15
Years of
Experience
Rooted in Industrial Fertility: The 2010 Foundation
Amidst Jinan’s industrial transformation, KLEIN emerged with a focus on premium window and door systems tailored for high-end commercial buildings. Leveraging Shandong’s strong manufacturing heritage, we began by offering localized services to businesses throughout the region.
Defining Our Core Values
From the outset, KLEIN established its guiding strategy: “Large Projects, Precision Delivery.” We embedded military-grade precision, full-process quality control, and a 24-hour service response into our operations, forming a strong foundation for nationwide scalability.
A Breakthrough Project
In 2013, KLEIN won the contract for the renovation of the Jinan Olympic Sports Center. Our high wind-resistance and energy-efficient systems earned government recognition, marking our entry into the public construction sector.
Xiaomi Headquarters, Beijing
Custom-developed smart ventilation window systems aligned with Xiaomi’s low-carbon, high-tech campus vision.
Expanding Global Horizons
In 2022, KLEIN launched its International Business Division, exporting to Southeast Asia and the Middle East. We contributed to the Dubai Smart City project and obtained CE certification from SGS, aligning our products with stringent European quality standards.
Kingsoft Headquarters, Wuhan
Delivered large-format safety glass facade systems with curtain wall performance for enterprise-grade security and design.
Bank of China Regional Data Center
Supplied fire- and explosion-resistant doors and windows that exceeded national safety standards.
Digitally Empowered Manufacturing
Our intelligent factory in Jinan features a state-of-the-art MES system, enabling fully flexible, made-to-order production. We have reduced custom window delivery lead times to just 15 days, supporting diverse architectural needs with “a thousand windows, a thousand solutions.”
KLEIN Windows & Doors Co., Ltd. – Breathing Life into Architecture Since 2010
Founded in 2010 in Jinan, the heart of Shandong Province—also known as the “City of Springs”—KLEIN Windows & Doors has grown from a regional solution provider into a trusted national expert, serving over 220 large-scale enterprises across China. With a mission to “infuse architecture with the art of breathing,” we are committed to integrating sustainability, safety, and aesthetics into every structure we touch.
The factory's production line
Modern door and window productionlines, equipped with advanced pro-cessing equipment and intelligentdetection systems, achieve efficient,precise,and scalable production withstable and reliable quality.
Production process
Full-process lean manufacturing:from profile cutting and precision machiningto surface treatment, intelligent assem-bly, and strict quality inspection, guar-anteeing superior quality for every door/window unit.
QA&QC
Certificate
One-Stop Provider of High-End Architectural Door and Window Systems
