diff --git a/cell.go b/cell.go
index f455edff..61dbed62 100644
--- a/cell.go
+++ b/cell.go
@@ -460,6 +460,8 @@ func (f *File) setSharedString(val string) (int, error) {
 	if i, ok := f.sharedStringsMap[val]; ok {
 		return i, nil
 	}
+	sst.mu.Lock()
+	defer sst.mu.Unlock()
 	sst.Count++
 	sst.UniqueCount++
 	t := xlsxT{Val: val}
@@ -581,6 +583,8 @@ func (c *xlsxC) getValueFrom(f *File, d *xlsxSST, raw bool) (string, error) {
 			if _, ok := f.tempFiles.Load(defaultXMLPathSharedStrings); ok {
 				return f.formattedValue(&xlsxC{S: c.S, V: f.getFromStringItem(xlsxSI)}, raw, CellTypeSharedString)
 			}
+			d.mu.Lock()
+			defer d.mu.Unlock()
 			if len(d.SI) > xlsxSI {
 				return f.formattedValue(&xlsxC{S: c.S, V: d.SI[xlsxSI].String()}, raw, CellTypeSharedString)
 			}
diff --git a/numfmt.go b/numfmt.go
index cad67a2d..29702302 100644
--- a/numfmt.go
+++ b/numfmt.go
@@ -948,13 +948,10 @@ func (nf *numberFormat) zeroHandler() string {
 // textHandler will be handling text selection for a number format expression.
 func (nf *numberFormat) textHandler() (result string) {
 	for _, token := range nf.section[nf.sectionIdx].Items {
-		if inStrSlice([]string{nfp.TokenTypeDateTimes, nfp.TokenTypeElapsedDateTimes}, token.TType, false) != -1 {
-			return nf.value
-		}
 		if token.TType == nfp.TokenTypeLiteral {
 			result += token.TValue
 		}
-		if token.TType == nfp.TokenTypeGeneral || token.TType == nfp.TokenTypeTextPlaceHolder || token.TType == nfp.TokenTypeZeroPlaceHolder {
+		if token.TType == nfp.TokenTypeTextPlaceHolder || token.TType == nfp.TokenTypeZeroPlaceHolder {
 			result += nf.value
 		}
 	}
@@ -964,6 +961,9 @@ func (nf *numberFormat) textHandler() (result string) {
 // getValueSectionType returns its applicable number format expression section
 // based on the given value.
 func (nf *numberFormat) getValueSectionType(value string) (float64, string) {
+	if nf.cellType != CellTypeNumber && nf.cellType != CellTypeDate {
+		return 0, nfp.TokenSectionText
+	}
 	isNum, _, _ := isNumeric(value)
 	if !isNum {
 		return 0, nfp.TokenSectionText
diff --git a/numfmt_test.go b/numfmt_test.go
index 773fac32..1e6f6bb8 100644
--- a/numfmt_test.go
+++ b/numfmt_test.go
@@ -1008,12 +1008,17 @@ func TestNumFmt(t *testing.T) {
 		result := format(item[0], item[1], false, CellTypeNumber)
 		assert.Equal(t, item[2], result, item)
 	}
-	for _, item := range [][]string{
-		{"1234.5678", "General", "1234.5678"},
-		{"1234.5678", "yyyy\"年\"m\"月\"d\"日\";@", "1234.5678"},
-		{"1234.5678", "0_);[Red]\\(0\\)", "1234.5678"},
-	} {
-		result := format(item[0], item[1], false, CellTypeSharedString)
-		assert.Equal(t, item[2], result, item)
+	for _, cellType := range []CellType{CellTypeSharedString, CellTypeInlineString} {
+		for _, item := range [][]string{
+			{"1234.5678", "General", "1234.5678"},
+			{"1234.5678", "yyyy\"年\"m\"月\"d\"日\";@", "1234.5678"},
+			{"1234.5678", "h\"时\"mm\"分\"ss\"秒\";@", "1234.5678"},
+			{"1234.5678", "\"¥\"#,##0.00_);\\(\"¥\"#,##0.00\\)", "1234.5678"},
+			{"1234.5678", "0_);[Red]\\(0\\)", "1234.5678"},
+			{"1234.5678", "\"text\"@", "text1234.5678"},
+		} {
+			result := format(item[0], item[1], false, cellType)
+			assert.Equal(t, item[2], result, item)
+		}
 	}
 }
diff --git a/xmlSharedStrings.go b/xmlSharedStrings.go
index 704002c7..b2b65d1e 100644
--- a/xmlSharedStrings.go
+++ b/xmlSharedStrings.go
@@ -11,7 +11,10 @@
 
 package excelize
 
-import "encoding/xml"
+import (
+	"encoding/xml"
+	"sync"
+)
 
 // xlsxSST directly maps the sst element from the namespace
 // http://schemas.openxmlformats.org/spreadsheetml/2006/main. String values may
@@ -21,6 +24,7 @@ import "encoding/xml"
 // is an indexed list of string values, shared across the workbook, which allows
 // implementations to store values only once.
 type xlsxSST struct {
+	mu          sync.Mutex
 	XMLName     xml.Name `xml:"http://schemas.openxmlformats.org/spreadsheetml/2006/main sst"`
 	Count       int      `xml:"count,attr"`
 	UniqueCount int      `xml:"uniqueCount,attr"`