Your Engineering & Procurement Hub in China

Backed by TSR Imports (USA), we bridge the gap between complex structural requirements and reliable manufacturing. We don’t just source; we engineer, audit, and inspect.

Our Story & Team

The Technical & Business Synergy

BoltSprout operates as the dedicated China Technology and Procurement Office for TSR Imports (USA). We are a specialized duo combining deep mechanical engineering expertise with seamless international business communication.

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About Mark

Engineering & Quality Control

Led by Mark, a degreed Mechanical Automation Engineer, our technical division handles factory auditing, drawing translation, and rigorous on-site quality control.

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About Gray

Client Success & Communication

Led by Mark, a degreed Mechanical Automation Engineer, our technical division handles factory auditing, drawing translation, and rigorous on-site quality control.

We represent your interests on the factory floor, ensuring every steel beam and modular unit meets exact international standards before loading.

What Makes Us Different

Expertise Shown Through Action, Not Just Words

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Structural & Mechanical Review

We don’t just pass your RFQ to a factory. We review CAD/DWG drawings, assess wind/snow load requirements for outdoor structures, and verify manufacturing tolerances based on our mechanical engineering background.

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Strict Supply Chain Auditing

Reliability is built on data. We actively screen suppliers by physically verifying MTCs (Mill Test Certificates), checking NDT (Non-Destructive Testing) reports for welds, and inspecting galvanization thickness on-site with calibrated calipers and gauges.

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Transparent Project Management

From raw material cutting to the final container loading supervision, you receive detailed, evidence-based reports. We eliminate the “black box” of overseas procurement.

Stop Guessing with Unverified Suppliers.

Let's Build It Right ​

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