Ling Jin — mechanical engineer and China sourcing consultant

LING JIN · BASED IN CHINA

ABOUT · LING JIN

I'm Ling Jin —
13 years in metal parts.

A nationally certified senior mechanical engineer, trained inside extrusion plants, CNC shops and die-casting floors. Today I hold drawings and factories for overseas buyers: drawing checked, shop walked, first article measured, then we ship. If you have no engineering office in China, I'm that part of your team.

Your drawing gets checked against the process before it leaves

Every shop on my list was walked — not read in a brochure

Tooling, samples, first article, volume — one person on it

Quote, progress, shipment — the same window the whole way

13 YRSon China's shop floors

4process families

1 PCprototype to volume

DDPto your dock

Four processes — whatever your part needs.

Fibre laser cutting head cutting holes in steel sheet

Sheet metal

Laser cutting, turret punching, bending, welding, powder coating — flat sheet to finished part.

See the sheet-metal shop

Cut sections of aluminum extrusion profiles

Aluminum extrusion

Die design, pressing, ageing, precision cutting — then machining, on the same line.

See the extrusion shop

Stacked aluminum die-cast parts waiting for shipment

Aluminum die casting

Gating, overflow and venting fixed before the die is cut — porosity isn't patched afterwards.

See the die casting shop

CNC milling an aluminum part with coolant spray

CNC machining

3-axis, 4-axis and turn-mill — fixture and first article proven before volume runs.

See how CNC machining works

One part often crosses two or three of these: a casting that needs machining, sheet metal that needs coating, a profile that needs drilling. Buy each process from a different shop, and nobody owns the failure.

Want an engineer on your China side? First evaluation free

A drawing, a sample, or a dimensioned sketch — anything works. One working day to a reply: can it be made, and roughly what it costs.

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