píngmiànqūxiàn
ㄆㄧㄥˊ ㄇㄧㄢˋ ㄑㄩ ㄒㄧㄢˋ
Simplified 平面曲线
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 平面曲線 and it comes back until you know it.