Hello, I am an app developer from China. We are developing a mobile game that will be released on iOS and Android platforms (as well as some PC and Mac platforms). The game is a commercial app. My question is: we would like to use the "PingFang" Chinese font in our game software. Do we need to obtain a license, and how should we go about obtaining it? (For example, through which channels should we apply for the license, and what are the associated fees?)