Against the backdrop of accelerating population aging and rising health‑conscious consumption, China now has over 100 million COPD patients, with surging demand for home oxygen therapy, chronic disease rehabilitation, and supplemental oxygen during high‑altitude travel. In 2024, China's oxygen concentrator market surpassed RMB 11.7 billion, maintaining an annual growth rate of 20%. While over 20% of households in Europe and the US own portable oxygen devices, China's household penetration rate remains below 1%, signaling immense growth potential for the portable oxygen industry.

I. The Era of Opportunity: Blue Ocean Rises for Portable Oxygen, Domestic Brands Embrace New Prospects

Suzhou Yangduoduo Medical Technology Co., Ltd., based in the Kunshan Medical Device Industrial Park in Jiangsu, brings together a full‑spectrum team of R&D, algorithm, production, and marketing talent. Breaking away from the industry's common OEM (Original Equipment Manufacturer) and white‑label assembly model, the company insists on full in‑house development of both software and hardware. Within just three years, it has successfully launched multiple generations of products, obtained a medical device production license, ISO 13485 certification, and numerous patents and software copyrights. It has repeatedly topped domestic sales charts during major e‑commerce promotions, rapidly establishing itself as a leading player in China's portable oxygen sector.

II. Precision Manufacturing: Gram‑Level Molecular Sieve Filling + Full‑Process Aging Testing – Building the Lifeline of Product Quality

The molecular sieve is the "heart" of an oxygen concentrator. Its filling precision directly determines oxygen concentration stability and product service life. Most competing products rely on manual filling, with errors typically reaching several grams and inconsistent quality control. Yangduoduo has built its own fully automatic precision molecular sieve filling line, leveraging intelligent weighing and control systems to achieve gram‑level accuracy. Filling error per tower is controlled within ±0.1g, with smart calibration for dual‑tower proportioning. The entire process — feeding, filling, and sealing — is automated in a closed loop, eliminating common defects such as uneven filling, voids, and material overflow. The company selects French‑imported CECA molecular sieves, combined with precision filling processes, ensuring stable 93%±3% medical‑grade oxygen concentration for the YDD medical series, and stable 90%+ oxygen concentration across all wellness‑grade models. Thanks to the proprietary quick‑release molecular sieve design, filled modules can be disassembled and replaced by hand, significantly reducing long‑term user maintenance costs.

After filling and assembly, all products undergo mandatory automated aging testing on a proprietary production line, utilizing the company's patented Automatic Aging Test System for Oxygen Concentrators. The testing standard requires uninterrupted full‑load aging for four consecutive hours for all models in the YDD medical series as well as the ROC, Cloud, and F wellness series.

During aging, the system monitors dozens of operational parameters in real time — including oxygen concentration, flow rate, compressor temperature, and sensor sensitivity — automatically sorting out units with abnormal parameters for rework. In addition, environmental simulation chambers subject sample units to alternating high‑and‑low temperature conditions, replicating extreme scenarios such as intense heat, severe cold, and high‑altitude low pressure to pre‑eliminate environmental adaptability risks. This rigorous filling and testing system underpins the brand's confidence in offering long‑term warranties.

III. Technological Breakthrough: Proprietary Smart Oxygen Delivery Algorithms Shatter Foreign Brands' Technical Barriers

Proprietary core algorithm development is Yangduoduo's fundamental competitive edge. The company's self‑developed pulse‑dose oxygen delivery algorithm tracks real‑time human respiration and ambient pressure variations, solving the inaccuracies caused by sensor drift and individual breathing differences to achieve 100% precise on‑demand oxygen delivery.

Building on this foundational algorithm, the AI‑driven high‑altitude adaptive program automatically fine‑tunes operating parameters every 500 meters of elevation. After extensive field tests across multiple high‑altitude locations in Tibet, it has proven capable of delivering stable, high‑concentration oxygen even at extreme altitudes of 6,000 meters — effectively overcoming the long‑standing industry pain point of performance degradation at high altitudes.

Through proprietary technology and finely managed production lines, comprehensive production costs have been significantly optimized, with final retail prices up to 30% lower than leading imported brands. This breaks the long‑standing monopoly of overseas brands and achieves "imported quality at a domestic price."

IV. Full‑Spectrum Portfolio: Four Product Lines Covering Medical and Wellness Scenarios

Yangduoduo operates across both medical and wellness domains, offering four product families — YDD Medical, ROC, Cloud, and F Series — precisely matching the oxygen needs of various user groups.

YDD Medical Series – Certified medical‑grade products with adjustable flow rates from 1 to 6 levels. The unit weighs only 1.65kg (bare unit) and 2.1kg with battery. It features dual detachable battery options, with low‑flow endurance of up to 6 hours. Equipped with intelligent fault alerts and support for remote data viewing via WeChat Bluetooth mini‑program, it is ideal for home oxygen therapy for chronic conditions such as COPD and cardiovascular diseases, as well as for primary care institutions and nursing homes.

ROC & Cloud Premium Wellness Series – Ultra‑lightweight at just 1.28kg, integrating four modes: pulse‑dose, continuous flow, oxygen‑enriched, and nebulization. The oxygen‑enriched mode delivers a safe 60% medium‑concentration oxygen and supports simultaneous use by two users. Designed for high‑altitude road trips, daily home wellness, and rehabilitation.

F Series – High‑Cost‑Effectiveness Models – Featuring an innovative Type‑C fast‑charging design, fully compatible with 65W outdoor power banks, eliminating power cord constraints. Tailored for light‑usage scenarios such as office overtime, exam preparation, and routine oxygen supplementation for pregnant women. Across the entire product range, the company has moved away from the bulky 5kg–15kg designs of traditional concentrators, enabling truly flexible oxygen use — at home, in vehicles, on mountains, or during travel.

V. Multi‑Dimensional Business Model: Leading Online, Deepening Offline — Expanding Market Reach Through Omnichannel Strategy

Yangduoduo adopts a dual‑track business model of online retail and offline distribution. Online, it has established a strong presence on mainstream e‑commerce platforms, securing the No.1 sales position among domestic portable concentrators during the 2024 Double 11 and 2025 618 shopping festivals, garnering extensive user word‑of‑mouth. Offline, the company continues to expand its network of provincial distributors, steadily building physical channel presence. Its profit model extends beyond standalone device sales, incorporating product retail, consumable repurchases, and technology licensing — a diversified system that captures greater value across the industry chain.

VI. Looking Ahead: Committed to Craftsmanship, Aspiring to Lead as China's Premier Portable Oxygen Brand

Riding on the dual tailwinds of a deepening aging population and expanding high‑altitude tourism and cultural industries, Yangduoduo will continue to focus on core manufacturing processes — precision molecular sieve filling and automated aging testing — while iterating its smart oxygen delivery technologies. Through self‑reliant innovation and precision engineering, the company aims to steadily narrow the gap between domestic and international products, upholding its founding mission of accessible oxygen therapy for all. With Chinese intelligent manufacturing, Yangduoduo is empowering hundreds of millions of people to enjoy high‑quality, healthy oxygen — and steadily advancing toward its goal of becoming the national leader in portable oxygen solutions.