diff --git a/xls/record/sst.go b/xls/record/sst.go
index 47e8048..f93858c 100644
--- a/xls/record/sst.go
+++ b/xls/record/sst.go
@@ -62,12 +62,11 @@ func (s *SST) Read(readType string, grbit byte, prevLen int32) () {
 	if len(s.RgbSrc) == 0 {
 		return
 	}
-
 	oft := uint32(0)
-
 	for {
 
 		var _rgb structure.XLUnicodeRichExtendedString
+		var rgbSize int
 
 		cch := int(helpers.BytesToUint16(s.RgbSrc[0:2]))
 
@@ -81,21 +80,83 @@ func (s *SST) Read(readType string, grbit byte, prevLen int32) () {
 
 		readType = ""
 
-		addBytesLen := (len(s.RgbSrc) - 3) - s.ByteLen
+		if cch >= (len(s.RgbSrc)-3)/(1+int(grbit&1)) || s.ByteLen > 0 {
+
+			addBytesLen := (len(s.RgbSrc) - 3) - s.ByteLen
+
+			if cch-s.chLen > addBytesLen/(1+int(grbit&1)) {
+				s.chLen = s.chLen + addBytesLen/(1+int(grbit&1))
+				s.ByteLen = s.ByteLen + addBytesLen
+				return
+			} else {
+
+				s.ByteLen = s.ByteLen + (cch-s.chLen)*(1+int(grbit&1))
+				s.chLen = cch
+				rgbSize = s.ByteLen
+			}
 
-		if cch-s.chLen > addBytesLen/(1+int(grbit)) {
-			s.chLen = s.chLen + addBytesLen/(1+int(grbit))
-			s.ByteLen = s.ByteLen + addBytesLen
-			return
 		} else {
-			s.ByteLen = s.ByteLen + (cch-s.chLen)*(1+int(grbit))
-			s.chLen = cch
+			rgbSize = cch * (1 + int(grbit&1))
+		}
+
+		copy(_rgb.Cch[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+
+		_rgb.FHighByte = s.RgbSrc[iOft(&oft, 0):iOft(&oft, 1)][0]
+
+		if _rgb.FHighByte>>3&1 == 1 { // if fRichSt == 1
+			copy(_rgb.CRun[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+		}
+
+		if _rgb.FHighByte>>2&1 == 1 { //fExtSt  == 1
+			copy(_rgb.CbExtRst[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 4)])
+		}
+
+		//offset rgbSize
+		_rgb.Rgb = make([]byte, uint32(rgbSize))
+		copy(_rgb.Rgb[0:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, uint32(rgbSize))])
+
+		if _rgb.FHighByte>>3&1 == 1 { // if fRichSt == 1
+			cRunSize := helpers.BytesToUint16(_rgb.CRun[:])
+			for i := uint16(0); i <= cRunSize-1; i++ {
+				var rgRun structure.FormatRun
+				copy(rgRun.Ich[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+				copy(rgRun.Ifnt.Ifnt[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+				_rgb.RgRun = append(_rgb.RgRun, rgRun)
+			}
 		}
 
-		realSize := _rgb.Read(s.RgbSrc[iOft(&oft, 0):])
-		iOft(&oft, realSize)
+		if _rgb.FHighByte>>2&1 == 1 { //fExtSt  == 1
+			copy(_rgb.ExtRst.Reserved[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+			copy(_rgb.ExtRst.Cb[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+
+			copy(_rgb.ExtRst.Phs.Ifnt.Ifnt[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+			copy(_rgb.ExtRst.Phs.Info[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+
+			copy(_rgb.ExtRst.Rphssub.Crun[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+			copy(_rgb.ExtRst.Rphssub.Cch[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+
+			copy(_rgb.ExtRst.Rphssub.St.CchCharacters[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+
+			rgchDataSize := helpers.BytesToUint16(_rgb.ExtRst.Rphssub.St.CchCharacters[:]) * 2
+			for i := uint16(0); i <= rgchDataSize; i++ {
+				_rgb.ExtRst.Rphssub.St.RgchData = append(_rgb.ExtRst.Rphssub.St.RgchData, s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)]...)
+			}
+
+			//The number of elements in this array is rphssub.crun
+			phRunsSizeL := helpers.BytesToUint16(_rgb.ExtRst.Rphssub.Crun[:])
+			if phRunsSizeL > 0 {
+				for i := uint16(0); i <= phRunsSizeL; i++ {
+					var phRuns structure.PhRuns
+					copy(phRuns.IchFirst[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+					copy(phRuns.IchMom[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+					copy(phRuns.CchMom[:], s.RgbSrc[iOft(&oft, 0):iOft(&oft, 2)])
+
+					_rgb.ExtRst.Rgphruns = append(_rgb.ExtRst.Rgphruns, phRuns)
+				}
+			}
+		}
 
-		if len(s.RgbSrc) >= int(realSize) {
+		if len(s.RgbSrc) >= int(oft) {
 			s.Rgb = append(s.Rgb, _rgb)
 			s.RgbSrc = s.RgbSrc[int(oft):]
 			s.chLen = 0