core/src/main/java/com/alibaba/fastjson2/JSONWriter.java [2422:2496]:
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                            switch (ch) {
                                case '/':
                                case ':':
                                case ';':
                                case '`':
                                case '.':
                                case '~':
                                case '!':
                                case '@':
                                case '#':
                                case '%':
                                case '^':
                                case '&':
                                case '*':
                                case '[':
                                case ']':
                                case '<':
                                case '>':
                                case '?':
                                case '(':
                                case ')':
                                case '-':
                                case '+':
                                case '=':
                                case '\\':
                                case '"':
                                case '\'':
                                case ',':
                                    if (off + 1 >= buf.length) {
                                        int newCapacity = buf.length + (buf.length >> 1);
                                        buf = Arrays.copyOf(buf, newCapacity);
                                    }
                                    buf[off] = '\\';
                                    buf[off + 1] = (byte) ch;
                                    off += 2;
                                    break;
                                default:
                                    if ((ch >= 0x0001) && (ch <= 0x007F)) {
                                        if (off == buf.length) {
                                            int newCapacity = buf.length + (buf.length >> 1);
                                            buf = Arrays.copyOf(buf, newCapacity);
                                        }
                                        buf[off++] = (byte) ch;
                                    } else if (ch >= '\uD800' && ch < ('\uDFFF' + 1)) { //  //Character.isSurrogate(c)
                                        ascii = false;
                                        final int uc;
                                        if (ch < '\uDBFF' + 1) { // Character.isHighSurrogate(c)
                                            if (name.length() - i < 2) {
                                                uc = -1;
                                            } else {
                                                char d = name.charAt(i + 1);
                                                // d >= '\uDC00' && d < ('\uDFFF' + 1)
                                                if (d >= '\uDC00' && d < ('\uDFFF' + 1)) { // Character.isLowSurrogate(d)
                                                    uc = ((ch << 10) + d) + (0x010000 - ('\uD800' << 10) - '\uDC00'); // Character.toCodePoint(c, d)
                                                } else {
//                            throw new JSONException("encodeUTF8 error", new MalformedInputException(1));
                                                    buf[off++] = (byte) '?';
                                                    continue;
                                                }
                                            }
                                        } else {
                                            //
                                            // Character.isLowSurrogate(c)
                                            buf[off++] = (byte) '?';
                                            continue;
//                        throw new JSONException("encodeUTF8 error", new MalformedInputException(1));
                                        }

                                        if (uc < 0) {
                                            if (off == buf.length) {
                                                int newCapacity = buf.length + (buf.length >> 1);
                                                buf = Arrays.copyOf(buf, newCapacity);
                                            }
                                            buf[off++] = (byte) '?';
                                        } else {
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core/src/main/java/com/alibaba/fastjson2/JSONWriter.java [2536:2611]:
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                            switch (ch) {
                                case '/':
                                case ':':
                                case ';':
                                case '`':
                                case '.':
                                case '~':
                                case '!':
                                case '@':
                                case '#':
                                case '%':
                                case '^':
                                case '&':
                                case '*':
                                case '[':
                                case ']':
                                case '<':
                                case '>':
                                case '?':
                                case '(':
                                case ')':
                                case '-':
                                case '+':
                                case '=':
                                case '\\':
                                case '"':
                                case '\'':
                                case ',':
                                    if (off + 1 >= buf.length) {
                                        int newCapacity = buf.length + (buf.length >> 1);
                                        buf = Arrays.copyOf(buf, newCapacity);
                                    }
                                    buf[off] = '\\';
                                    buf[off + 1] = (byte) ch;
                                    off += 2;
                                    break;
                                default:
                                    if ((ch >= 0x0001) && (ch <= 0x007F)) {
                                        if (off == buf.length) {
                                            int newCapacity = buf.length + (buf.length >> 1);
                                            buf = Arrays.copyOf(buf, newCapacity);
                                        }
                                        buf[off++] = (byte) ch;
                                    } else if (ch >= '\uD800' && ch < ('\uDFFF' + 1)) { //  //Character.isSurrogate(c)
                                        ascii = false;
                                        final int uc;
                                        if (ch < '\uDBFF' + 1) { // Character.isHighSurrogate(c)
                                            if (name.length() - i < 2) {
                                                uc = -1;
                                            } else {
                                                char d = name.charAt(i + 1);
                                                // d >= '\uDC00' && d < ('\uDFFF' + 1)
                                                if (d >= '\uDC00' && d < ('\uDFFF' + 1)) { // Character.isLowSurrogate(d)
                                                    uc = ((ch << 10) + d) + (0x010000 - ('\uD800' << 10) - '\uDC00'); // Character.toCodePoint(c, d)
                                                } else {
//                            throw new JSONException("encodeUTF8 error", new MalformedInputException(1));
                                                    buf[off++] = (byte) '?';
                                                    continue;
                                                }
                                            }
                                        } else {
                                            //
                                            // Character.isLowSurrogate(c)
                                            buf[off++] = (byte) '?';
                                            continue;
//                        throw new JSONException("encodeUTF8 error", new MalformedInputException(1));
                                        }

                                        if (uc < 0) {
                                            if (off == buf.length) {
                                                int newCapacity = buf.length + (buf.length >> 1);
                                                buf = Arrays.copyOf(buf, newCapacity);
                                            }

                                            buf[off++] = (byte) '?';
                                        } else {
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