# SF Diamond

SF Diamond is a Corporate Investor based in Zhengzhou, China.

## Overview

- **Organization type:** Corporate Investor
- **Headquarters:** Zhengzhou, China
- **Region:** Asia
- **Address:** No. 109, 10th Street, Economic & Technological Development Area, Zhengzhou, Henan, China
- **Founded:** 1997
- **Assets under management:** Undisclosed
- **Website:** sf-diamond.com.cn
- **LinkedIn:** https://www.linkedin.com/company/sf-diamond-co-ltd

## Regulatory record

- **Reports private funds:** No

## About

SF Diamond was established by Fang Haijiang in Zhengzhou in 1997. The firm produces polycrystalline diamond (PCD) and composite super-hard materials used in oil and gas drilling, mining, and precision cutting tools. Fang chairs the company and also leads the Superhard Material (Industrial Diamond) Association of China, placing him at the center of the country's strategic diamond-materials supply chain. The company operates as a vertically integrated manufacturer and a public corporate investor (Shenzhen Stock Exchange ticker 300179). Its product lines span petroleum drill-bit PCD inserts, coal-mining and civil-engineering PCD compacts, wire-drawing die blanks, and precision super-hard tools. Exports reach over 40 countries, and SF Diamond maintains a North American subsidiary in Spring, Texas that participates in the United States Cutting Tool Institute. In October 2025 the firm exhibited at the EMO metalworking trade fair in Germany, where its PCD compacts earned a Vogel Communications Group export award. SF Diamond runs two manufacturing plants in Zhengzhou's Economic & Technological Development Area plus a dedicated lab-grown diamond factory in Henan Province. Director Xiao Ping Yan also serves as a Partner at Shenzhen CDH Equity Investment Management and as Executive Director of the Beijing Private Equity Association. Independent director Cai Manli is a senior advisor at King & Wood Mallesons. The firm's Shenzhen listing makes its operating scale transparent to institutional allocators, though investment-level AUM is not publicly disclosed. In February 2026 the firm held its 2025 year-end review and recognition conference. The firm's structural differentiator is its identity as a publicly traded industrial manufacturer that retains a corporate-investor posture. That dual character means any deployment decisions sit inside a listed-company governance framework with disclosed financials and a board that includes external legal and private-equity professionals — a transparency profile rare among corporate investors operating in critical-materials supply chains.

## Sectors

- Industrial Tech
- Energy Transition & Renewables

## Offices

- Spring, TX, United States

## People

- Fang Haijiang — Founder & Chairman
- Xiao Ping Yan — Director

## Questions

### Who runs investment decisions at SF Diamond?

Fang Haijiang, founder and chairman, leads the firm. Director Xiao Ping Yan — a partner at Shenzhen CDH Equity Investment Management — and independent director Cai Manli, a senior advisor at King & Wood Mallesons, sit on the board. Investment-level capital allocation decisions are made within the governance structure of the Shenzhen-listed parent.

### Where does the company generate its revenue?

Revenue comes from manufacturing and exporting polycrystalline diamond composites and super-hard tools. Primary end markets include oil and gas drilling, mining, wire drawing, and precision machining. The firm sells into more than 40 countries and maintains a US subsidiary in Spring, Texas.

### Which sectors does SF Diamond explicitly avoid?

The firm's stated focus is industrial diamond materials and tools. There is no public indication of activity in software, healthcare, consumer goods, or financial services.

## Related profiles

- [SFClub](https://altss.com/profile/sfclub)
- [S.F. Ehrlich Associates](https://altss.com/profile/s-f-ehrlich-associates)

---

Last updated: 2026-06-03T20:00:00.000Z

Canonical page: https://altss.com/profile/sf-diamond

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology