Fēinièěrtòujìng
ㄈㄟ ㄋㄧㄝˋ ㄦˇ ㄊㄡˋ ㄐㄧㄥˋ
Simplified 菲涅耳透镜
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 菲湼耳透鏡 and it comes back until you know it.