Thank you, Sam. And thank you, everyone, for making your time to join our earnings conference call today. Just a little over 2 months ago, on [ January 27, 2021 ], we successfully listed our shares on our New York Stock Exchange and started our new journey as a public company. On behalf of the management team, I would like to extend our gratitude to our employees, business partners and all our shareholders and stakeholders who have been following and supporting us.
I believe many of you are joining us today, not only to learn about our fourth quarter earnings result and full year achievements, but also to hear more about our response to the regulatory developments that occurred earlier this week. We are as attentive to these developments as you are, and we'll best answer any questions you have during the Q&A session.
Now I will talk you through our operational performance in the last year and then sharing our strategies going forward. Throughout last year, we remain focused on our mission and strategies and we have achieved a solid that of results despite the challenging macro environment.
First of all, looking at the overall e-vapor market in China, user penetration has been growing steadily. According to the CIC report, China's e-vapor user penetration rate grew from 0.4% in 2016 to 1.2% in 2019 and witnessed further growth in 2020. As the industry leader of the e-vapor market in China, we are well positioned to make RELX attractive brand for adult smokers providing better alternatives for them.
Secondly, on our commercial front, we pioneered and integrated offline distribution and branded store plus retail model, tailored to China's e-vapor market. Under this model, we identified and the leveraged a rarity of distribution and retail channels that allow us our products to reach adult smokers in a more effective manner.
As of September 30, 2020, we partnered with 110 authorized distributors to supply our products across over 5,000 RELX branded partner stores and over 100,000 other retail ones nationwide, covering over 250 cities in China as we adopt comprehensive systems and methods to manage, supervise and empower our distributors and retailers.
In this fourth quarter, we achieved significant growth in terms of number of branded stores and productivity. And increasing number of branded store partners have been joining our leading network and crossed the 10,000 mark for the first time in the fourth quarter. On the other hand, we have been expanding our retail outlet network with multiple forms. More importantly, more and more retailers have been increasingly recognizing the benefits of retailing e-vapor products and partnering with RELX.
In addition to commercial development to continually improve adult smokers' turns with our products, we have implemented a multiple layer development framework to provide a solid infrastructure for our technology and product development. This framework involves 5 development layers surrounding our e-vapor products. Mainly accessories, interactions, applications, face transition and infrastructure, catering to diversified needs of adult smokers.
In December 2020, we introduced RELX Phantom which embodies our latest technologies developed to holistically enhance user experience for adult smokers, including a newly introduced battery capacity indicators, improved lifetime and charging speed, strengthened structural resistance to e-liquid leakages, refined airway design and upgraded safety features. In the meantime, we have also received wide recognition for our products globally. In November 2020 RELX Infinity was granted the Golden Pin Design award 2020.
Turning to our corporate social responsibility development. We continued to consistently uphold and practice our ethical principles, including promoting the prevention of underage use of our products. Through our industry pioneering Guardian Program, introducing effective age verification practices to the industry. This past quarter witnessed the first anniversary of the launch of our Sunflower System, which is a first is kind technology-driven underage access prevention system in China, according to CIC Report.
The Sunflower System encompasses comprehensive set of technology-driven best practices. It's designed to prevent underage use through and area of advanced recognition tools, to enhance on-site age verification at the retail outlets. As well as through geo-fencing technology to identify the appropriate locations for opening with RELX Branded Partner Stores.
In addition, we have zero tolerance for counterfeit products that could jeopardize adult smokers health and interest. To that end, we launched the Golden Shield Program to combat sales of counterfeit products in cooperation with the public media and the local authorities.
At RLX, social responsibility is not something we do on the site. It's part of our DNA and embedded into our everyday actions, operations, systems throughout our organization. We have been caring for our user communities, our partners and our employees since day 1. We have always placed substantial emphasis on helping minorities and this is the [ vantage tool ] through initiatives that provide better services and technological solutions to help them with their unique needs.
In this regard, we recently launched 3 new initiatives: One to empower female entrepreneurs and working mothers. In order to assist to the elders -- elderly understanding and using technology in their everyday lives. And the third, to strengthen our equal opportunity guidelines. We will continue to prioritize social responsibility in our organization because it's part of who you are.
Looking ahead, we plan to further solidify our leadership by continuing to invest in scientific research, enhancing our technology and product development, strengthening our distribution and retail network, bolstering, supply chain and production capabilities. These strategic initiatives are designed to support our growth over the long term.
Here's to the end of my part, thank you, everyone. With that, I'll now turn the call over to Sam, who will discuss our key financial results.