up，中文字符显示向下挪动两个像素

code/firmware-2.7.15.567b8ea/src/graphics/draw/MessageRenderer.cpp

@@ -554,7 +554,7 @@ std::vector<int> calculateLineHeights(const std::vector<std::string> &lines, con
             uint16_t cp = cfont12_utf8(_line.c_str() + ci, &utf8len);
             if (cp >= 0x80 && cfont12_find(cp)) {
                 hasCJK = true;
-                lineHeight = std::max(lineHeight, CFONT_H);
+                lineHeight = std::max(lineHeight, CFONT_H + 2); // +2 for cfont12_draw y offset
                 break;
             }
             ci += utf8len;

code/firmware-2.7.15.567b8ea/src/graphics/fonts/ChineseFont12x12.h

@@ -21109,6 +21109,7 @@ inline const CFontGlyph* cfont12_find(uint16_t cp) {
 inline int cfont12_draw(OLEDDisplay*d,int x,int y,uint16_t cp){
   const CFontGlyph*g=cfont12_find(cp);
   if(!g)return 0;
+  y+=2;
   for(int r=0;r<CFONT_H;r++)for(int c=0;c<CFONT_W;c++){
     uint8_t b=pgm_read_byte(&g->bmp[r*CFONT_BPR+(c>>3)]);
     if(b&(0x80>>(c&7)))d->setPixel(x+c,y+r);