One-stop service


Our Group is principally a slewing ring manufacturer in the PRC and a machineries & parts service provider. The slewing rings we produce are the necessary transmission part for some large-size machineries and equipment. The slewing ring has a wide application in many areas such as construction machineries and equipment, wind turbines, military equipment and machineries, robotics, etc.. Besides slewing rings, we also source machineries, other mechanical parts and components of machineries for customers all over the world. Such as undercarriage parts, engine parts, consumable components, etc.. We maintain such line of business to complement our main line of business which is the manufacture and sale of slewing rings to enable our customers to enjoy a more comprehensive “one-stop service” from us.

Founder of Group

Mr. YP Chan is an entrepreneur with over 10 years operational experience. He was involved in the trading of machineries and spare parts in Hong Kong and manufacture and sales of spare parts in the PRC.


Slewing rings OEM, OBM, ODM based on primarily JIS, and in some circumstances other standards such as JB or JB/T. Machineries and parts sourcing from all countries, at mid to high range of quality to suit various customer.


International based customers and suppliers, experienced and capable management team, in-depth market knowledge and stringent quality assurance, stable and reputation.


Team from over 30 years’ experience in house engineer, 10 years’ experience basis staffs and a Japanese consultant randomly cross check. A solid technical team give customer a strong stringent quality assurance.


A close relationship with our customers. We contact our customers regularly to obtain feedback on our products and services, assist our customers in case of any major enquiries, provide timely assistance and advise on the application, replacement and any maintenance questions.

Year Milestone


2007 Kyoei Seiki was incorporated on 5 September 2007.
Wing Fung injected HK$8 million of capital in Kyoei Seiki, following which Kyoei
Seiki commenced business in October.


2009 Our factory has been assessed and certified to meet the requirements of GB/T 19001–
2008/ISO 9001:2008 and GB/T 19001–2000 idt ISO 9001:2000 quality management system standard in January.
We participated in the Beijing International Construction Machinery Exhibition and Seminar in November.


2010 We obtained the first OEM order from a Japanese client in March.
We extended our warehouse in June.
We started to sell slewing rings to North America in September.
We participated in Bauma China, one of the world’s largest trade fair in the construction industry in Shanghai, China in November.
We started to sell our products to, a subsidiary of a then listed company on Singapore Exchange, which was principally engaged in the trading of heavy machinery and diesel engine parts in November.


2011 Our factory was assessed and re-accredited with GB/T 9001:2008/ISO 9001:2008 by Beijing Xingguo Global Certification Co., Ltd in December.


2012 We started to sell slewing rings to Australia in February.
We were awarded with the Certificate for Measurement Assurance System (Level 3)(計量保證體系確認合格證書) by the Bureau of Quality Supervision of Dongguan City (東莞市質量技術監督局) in July.
We began to receive orders from a leading machinery and parts supply company in Japan in July.
We participated in the Bauma China in Shanghai, China in November.


2013 We started to sell slewing rings to Italy in January.


2014 We received certification of quality of our heat treatment process from Sumitomo (S.H.I.) Construction Machinery Company, Limited in February.
We engaged in a research and development project with Nanjing Tech University in October.
Kyoei Seiki was assessed and certified as meeting the requirements of ISO 9001:2008 quality management system standards by SGS United Kingdom Ltd in December.


2016 We started to sell slewing rings to New Zealand in April.


2017 We participated in the drafting of the national Industry Technical Standards (行業技術標準) in China in April.
We successfully registered nine patents in China in June.
We obtained Certificate of High and New Technology Enterprise (高新技術企業證書) by Guangdong Provincial Science and Technology Department (廣東省科學技術廳), Guangdong Provincial Finance Bureau (廣東省財政廳), Guangdong Provincial Office of State Administration of Taxation (廣東省國家稅務局) and Guangdong Provincial Local Taxation Bureau (廣東省地方稅務局) in November.
Our factory has been assessed and certified as meeting the requirements of ISO 9001:2015 quality management system standards in December.


2018 We received renewal certification of quality of our heat treatment process from Sumitomo (S.H.I.) Construction Machinery Company, Limited. The Group remains the only slewing ring manufacturer based in the PRC to have received such recognition from Sumitomo.


2019 In August, the Group has received request for quotation from a new OEM customer who is principally engaged in the production of dock crane, for production of slewing rings.
The Group was successfully listed on the Hong Kong Stock Exchange (HKEx) with the stock code 8617 in November.