You can connect several devices to one account, with the maximum number depending on the selected subscription plan. Important points to consider about this feature are:

• Accounts can be accessed from various platforms, irrespective of the original sign-up platform (e.g., Android, iOS, macOS, Windows).
• The number of allowed devices differs according to the subscription plan, potentially enabling an unlimited number of devices per account.
• Alerts will be issued if the number of connected devices surpasses the plan limit, notifying users to disconnect excess devices upon logging in.
• Each device can be associated with up to two accounts, whether it’s a computer or a mobile device.

Certainly! You have the opportunity to access O2 NPV for China at no cost indefinitely through the "Daily Check-in" feature. Every day, you receive 15 minutes of complimentary usage time. Moreover, you can earn 1 point for every successful referral, which can be redeemed for a 1-day pass. Here are the key details:

• O2 NPV for China is dedicated to providing the "Daily Check-in" feature for free indefinitely.
• New users are granted an initial 15 minutes of complimentary usage time, and you can obtain an additional 15 minutes by completing the check-in process the next day.
• During the free trial, you are free to utilize our services without any limitations on usage. However, please be aware that server access is limited to locations included in the free plan.
• You can gather points by engaging in our referral program, which can then be redeemed for various plan options.

Of course! We offer a 15-minute daily trial period. To start your trial, kindly follow these steps:

1. Get the O2 NPV for China app.
2. Create a new account.
3. Press the "Daily Check-In" button on the app's main screen.

Please note that the availability of this free trial may change and could be terminated at any time without prior notice.

O2 NPV for China prioritizes user privacy by not retaining any activity or connection logs. Additionally, the NPV service refrains from storing any data that could be utilized to monitor particular network activities or behaviors attributed to an individual user.

You can reach us through the following methods:

• Website: http://koolo2npv.com
• Email: [email protected]
• QQ: available soon
• Telegram: available soon

You can reach us through the following methods:

• Website: http://koolo2npv.com
• Email: [email protected]
• QQ: available soon
• Telegram: available soon

The split mode feature in O2 NPV for China is compatible with web applications such as Telegram, WhatsApp, or Gmail, which make use of HTTPS. This mode can modify the routing for both HTTP (port 80) and HTTPS (port 443), enabling access to the web versions of these applications. However, the application versions might utilize different ports.

To ensure access, the following steps should be taken:

• Select the "Global Mode" option found in the routing settings.
• Adjust the proxy settings of the application. For instance, here's how to change the proxy settings for the LINE app:
  
  

• When you try to log in on a new device and go beyond the device limit, you will be redirected to the "Unbind Device" page, allowing you to disconnect any linked devices.
• Alternatively, you can go to "Menu" > "App Settings" > "Device List" to choose and unbind a device that you prefer.

Forgetting usernames or passwords is a frequent occurrence, and we strive to simplify the recovery process. Here are your options:

• If you can't recall your username, please reach out to us and include a screenshot of your payment history.
• If you've misplaced your password, simply utilize the "forgot password" option found in the app.

We've observed that some users find it challenging to select a server after picking a region.

To make this easier, we now only showcase regions. Heibao will automatically connect you to the top-performing server in your chosen region. Here are the details:

• The location menu will solely show regions, but every region includes hundreds of servers. Once you choose a region, Heibao automatically connects you to the server that provides the best performance based on your network conditions.
• If you're unhappy with the server you're connected to, you can disconnect and reconnect to the same region to connect to a different server.
• You can continue this process until you discover a server that fits your needs.

Common reasons for network problems include:

• Slow local internet speeds (without employing a NPV)
• Increased user traffic in specific NPV server locations

To fix these problems, you can attempt the following solutions:

• Verify your local internet speed by temporarily turning off the NPV
• Experiment with various network connections like WiFi, 4G, or 5G while the NPV is disabled to pinpoint any connection issues. For instance, if your WiFi is inconsistent, try using a mobile data connection.
• Disable the NPV, switch to a different server location, and then reconnect
• If you prefer to remain in the same geographical area, disconnect and then reconnect, as this may connect you to another server within the same region.
• Keep conducting these tests until you discover the most appropriate server for your needs.

Global Mode: This option enables NPV for all online activities, which may cause local websites and apps to load more slowly.

Split Mode: This configuration applies NPV only to sites that are restricted based on geographic location, such as Google, YouTube, and Netflix, while preserving local network access for Chinese websites.

You can modify the routing mode in the App Settings.

If you encounter difficulties accessing specific websites or apps, consider switching to "Global Mode."

Please reach out to us if you require further assistance.

You can accumulate points by referring friends and utilize them to claim rewards. Here’s how it works:

• To begin, obtain your "Referral Code" or "Referral Link" by navigating to "Share & Gift" and selecting "Share Now." You can then share it with friends or post it on your social media accounts or blog.
• You will earn 1 point for every friend who successfully registers, which you can trade for a 1-day pass.
• You can check your redeemed plans in the "My Account" section after you have redeemed your points.
• For a referral to be deemed successful, your referred friend must download and actively use the app. If they download the app but don’t use it, you will not earn your referral point until they start using it.

Occasionally, there may be a delay in processing payments through the gateway. Here are the key points to remember:

• We support various payment methods, such as Alipay, WeChat QR Code Scanning Payment, and UnionPay.
• If you have completed a payment successfully but do not see the corresponding plan in your account right away, please wait about 5 minutes, then log out and log back in.
• If you continue to experience issues after attempting the above steps, please take a screenshot of your payment confirmation and contact us for further assistance.

该问题通常是由于系统代理地址设置不当或被第三方软件阻止引起的。解决方案是手动配置黑豹加速器（O2 NPV for China）的科学上网代理地址。

请遵循以下步骤操作：

• 在 Windows 系统中搜索并打开“Internet 选项”。
• 进入“连接”标签页。
• 点击底部右侧的“局域网设置”按钮。
• 在局域网（LAN）设置页面中，勾选“使用自动配置脚本”选项，并在下面的地址框中输入：http://127.0.0.1:7525/proxy。
• 点击右侧底部的“确定”按钮，然后再次点击“确定”以关闭 Internet 属性。
• 最后，请完全关闭浏览器，然后重新启动浏览器即可享受科学上网服务。

如下图所示：

When you install the O2 NPV for China app on Windows, you might receive warnings from your antivirus or firewall software since NPV applications can be viewed as possible threats. If you see these warnings, you should select options like "allow," "agree," or "trust" to proceed with the installation. This step is crucial for the NPV to operate correctly, as it requires making changes to proxy settings. Denying these permissions could impede the proper functioning of O2 NPV for China.

By utilizing O2 NPV for China on your Windows PC, you can ensure that all your activities remain secure. Connecting to one of our O2 NPV for China server locations will change your device's IP address to a new one, protect your data on unsafe Wi-Fi networks, and allow access to blocked websites and services.

Although free O2 NPV for China and proxy services are available, free O2 NPV for China is generally not recommended because they often lack the privacy and security measures found in paid O2 NPV for China Free O2 NPV for China frequently underperform, might endanger your data by selling it, and usually do not provide sufficient protection against potential cyber attacks.

Getting started is easy! Just sign up for O2 NPV for China, install the app on your device, and click the "On" button that appears on your screen.

Although Windows 10 and 11 include an NPV client, it doesn't offer a comprehensive NPV service. To enjoy all the advantages, you'll have to link up with a third-party NPV such as O2 NPV for China. The setup process can be somewhat complicated, so many prefer to simply use the O2 NPV for China app instead.

An NPV establishes a virtual network by connecting several computers online. Initially aimed at enhancing speed and security, it now primarily focuses on privacy, encryption, and accessing restricted content.