About – Oxygen Tree Forest Negative ion

About Our Company

Nanjing Keju Network Technology Co., Ltd.
Founded in 2016 and located in the beautiful city of Nanjing, China, our company proudly launched OxyTree Forest in 2024 — a innovative brand that emerges from years of accumulated expertise. With a decade-long focus on research and innovation in negative ion air purifiers, OxyTree Forest represents the culmination of three corporate teams’ successive R&D efforts and the dreams of two generations of doctoral teams.

About Dr. YaoHuaXu

Xu Yaohua
Founder of the Oxygen Tree Forest brand, currently serving as the General Manager of Nanjing Keju Network Technology Co., Ltd. He previously held the position of General Manager at the Medical Equipment Factory of Sandé Wisdom Group. With extensive expertise in research and development, he has led or participated in over 30 projects and product developments.

In 2017, Mr. Xu was selected into Nanjing’s “Plan for Top Technology Experts, Entrepreneurs, and High-Level Entrepreneurial Talents,” qualifying him for 叠加享受创业扶持资金 (superimposed access to entrepreneurial support funds) and government allowance subsidies. In 2018, his enterprise was listed on the Mass Innovation Board. He holds 3 national invention patents and 13 other patents.

Since the outbreak of the COVID-19 pandemic in 2020, he has re-teamed with the team led by Academician Zhong Nanshan from the State Key Laboratory of Respiratory Diseases. Leading a team of doctors, he has been dedicated to developing medical positive-pressure protective helmets, providing safe and healthy protection for medical professionals on the frontlines.

Why choosed us?

A Trustworthy Enterprise

Gaocun Talented Enterprise
Nanjing Municipal Talented Enterprise
Enterprise Listed on the Mass Innovation Board

A trustworthy brand

Focusing on negative ions, with ten years of R&D accumulation.

A trustworthy product

It has passed certifications such as CE, RoHS and FCC
And it is produced by ISO 9000-certified enterprises.

A trustworthy service

One year guarantee period, lifelong after-sales service.
100% Aging test for mass production.
Provide technical information and technical training support regularly.