Find a way to download papers for free on China HowNet. Very responsibly, there are no real free resources at all. Some so-called free resources only provide a small number of free downloads. If you want to continue downloading, there will be a charge.
Although there is no real free method, there is a relatively cheap and very affordable method. You can use the university library to log on to HowNet and download it. A few dollars can recharge 10 points, and you can use China HowNet for 40 days for free. There are no restrictions during the 40-day download period. You can download papers for free in China HowNet.