Thank you, Kathy. Hello, everyone, and thank you for joining our call today. Our strong performance in the fourth quarter capped off a year of rapid growth for NaaS. Riding on the tailwinds of the explosive EV market we continued to solidify our leadership across our charging service network and significantly scaled our client base for our one-stop charging solutions, nearly doubling our net revenues year-over-year in the fourth quarter.
To effectively address the industry's pain points, NaaS offers one-stop services including online and off-line charging solutions and other innovative businesses for charging stations, auto OEMs and other enterprises across the new energy value chain. Thanks to strong customer endorsement of our one-stop EV charging solutions, our net revenues increased by 177% year-over-year in the full year of 2023 -- 2022 to RMB 92.8 million.
Online charging services are the cornerstone of our business. Our high-quality services aided by network effects have driven our rapid market share expansion in the EV charging service industry. In 2022, gross transaction value through NaaS network reached RMB 2.7 billion, representing an increase of 119% year-over-year, with net take rate expanded by 3.74 bps.
Building on the foundation of our EV charging network, we focused on expanding our services to provide one-stop EV charging solutions, which cover each stage of our translation life cycle. These range from construction to operation and upgrades, and there will be our growth engine and source of profitability going forward. Since 2022, we have made significant strides in our business across these stages, gathering recognition from an increasing number of customers with offline EV charging solutions, contributing 44% of our revenue in 2022.
In the construction stage, we leveraged our big data backed industry insights, operational expertise and strong execution to offer site selection, hardware and software procurement and EPC turnkey construction solutions. As one of our ongoing projects, we provide one-stop EPC turnkey service to build charging stations in Wuhan. Commencing operations on March 26, 2023. Our first charging station is equipped with 16 DC fast chargers for a total installed capacity of 3,600 kilowatts and a total CapEx of over RMB 5 million.
From completion onwards, we provide operation and maintenance solutions to help clients reduce their operating costs and further improve efficiency and profitability while simultaneously increasing our recurring revenue. In operating stage, we digitalize and upgrade key aspects of our charging stations operation and management, working in concert with our capable off-line services team, the online intelligent operation and maintenance system we built for our charging stations responds to users' operation and maintenance needs, improving our charging stations, repair and maintenance efficiency.
Our product offerings not only boost our customer service quality and operational efficiency, but they also help our customers stand out among local competitors. We are currently providing maintenance services for over 15,000 parking parts at 2,100 charging stations in 186 cities. In upgrade stage, we help Chinese stations deploy energy storage upgrades. In January of this year, we partnered with HyperStrong, a leading energy storage system integrator and system service provider to establish a joint venture focusing on energy storage.
Meanwhile, we plan to launch our virtual power plant platform by mid-2023 to facilitate the establishment of a modern energy system for Charging stations. Our virtual power plant platform can promote energy efficiency and optimization, participate in the power trading market and provide various supporting services, such as peak shaving and value feeding of the broader power grid to achieve smart power dispatch.
Altogether, these efforts have facilitated the construction of a modern energy system. Thanks to its effectiveness in addressing the industry's pain points and improving ROI, our one-stop solution has attracted a growing roster of leading enterprises to establish strategic partnerships with us. The most recent example is smart charging. A joint venture we established in March 2023 with smart order and Internet platform in the lodging industry. We are jointly building a shared destination charging service network for EVs to address drivers last mile charging problems during road trips. With respect to R&D, in March, we launched our self-developed automatic charging robot empowered by technologies, including deep learning, 5G and V2X, SLAM, perception and regulation.
Our robots can connect with the underlying APIs of major OEMs, thus automatically opening the charging cover, accurately detecting the position of the charging port and automatically moving the charger in and out through the auto charging system of a mechanical arm. This smart and unmanned charging service can be easily deployed in parking lots without charging facilities at this time and will provide unmanned replenishment service for autonomous driving in the future. We have also started to explore overseas market by establishing our Asia Pacific and European headquarters in Singapore and Amsterdam, respectively.
We're delighted to have Allen Dong on our team as the General Manager for our European and Middle Eastern operations. Having worked for [ XPON ] and ABB previously, with over a decade of experience in EVs and in charging infrastructure in particular. I believe Allen's deep insights and passion for the EV industry will provide a strong boost to our development in overseas market. On top of the compensate progress we have made in our business, we continue to actively fulfill our social responsibilities. In 2022, we released our first ESG report which showcased our data and achievements in 4 areas: low-carbon operation, active innovation, employee care and public well-being.
In 2022, we achieved a carbon emission reduction of about 1.85 million tons, up 106% year-over-year.
Next, I will go over some of our financial results for the fourth quarter. I will address financial highlights here and encourage you to refer to our earnings press release, which is posted online for additional details. Our total net revenues reached RMB 29.5 million in the fourth quarter, up 95% year-over-year. The rapid increase was mainly the result of increases in platform order volumes and continued improvements in operations. Our total operating costs were RMB 151.1 million in the fourth quarter.
This was preliminarily due to our significant business expansion. Our net loss for the fourth quarter of 2022 was RMB 126.9 million as compared with a net loss of RMB 57.2 million for the same period of 2021. Turning to guidance for full year 2023. We expect our net revenues to be in the range of RMB 500 million and RMB 600 million. Growing by 5x to 6x from 2022. This forecast considers the company's current and preliminary view on the business situation and the market conditions, which are subject to change.
Looking ahead, as Kathy mentioned, we are very bullish about the EV energy service market. We continue to gear for strong growth through our one-stop EV charging solution and continue to take a disciplined approach to cost management, prioritize investment initiatives that deliver healthy ROIs and drive efficiency gains across our organization. This concludes our prepared remarks for today. Operator, we are now ready to take questions. Thank you.