jQuery("div[class*='ff'] .a").each((idx, elm) => {
  elm.textContent = Array.from(elm.textContent).map(c => {
    let charCode = c.charCodeAt(0);
    return String.fromCharCode((charCode & ~0xf) | {
      0x0: 0x4,
      0x1: 0xb,
      0x2: 0xf,
      0x3: 0xc,
      0x4: 0x2,
      0x5: 0x7,
      0x6: 0x8,
      0x7: 0xd,
      0x8: 0x9,
      0x9: 0x6,
      0xa: 0x0,
      0xb: 0x3,
      0xc: 0x1,
      0xd: 0xa,
      0xe: 0xe,
      0xf: 0x5,
    }[charCode % 16]);
  }).join('');
  jQuery(elm).css('font-family', 'PMingLiU');
});