diff --git a/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift b/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift
index 2062c98..6588b08 100644
--- a/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift
+++ b/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift
@@ -528,11 +528,11 @@ public class MTMathAtomFactory {
             case "\u{0410}"..."\u{044F}":
                 return MTMathAtom(type: .ordinary, value: chStr)
             case _ where ch.utf32Char < 0x0021 || ch.utf32Char > 0x007E:
-                // allow Chinese characters for testing
-                if ((ch.utf32Char >= 0x4E00) && (ch.utf32Char <= 0x9FFF)) {
-                    // CJK support. But xits-math-cn font only has Chinese characters support.
-                    return MTMathAtom(type:.ordinary, value:chStr)
-                }
+//                // allow Chinese characters for testing
+//                if ((ch.utf32Char >= 0x4E00) && (ch.utf32Char <= 0x9FFF)) {
+//                    // CJK support. But xits-math-cn font only has Chinese characters support.
+//                    return MTMathAtom(type:.ordinary, value:chStr)
+//                }
                 return nil
             case "$", "%", "#", "&", "~", "\'", "^", "_", "{", "}", "\\":
                 return nil
diff --git a/Tests/SwiftMathTests/ConcurrencyThreadsafeTests.swift b/Tests/SwiftMathTests/ConcurrencyThreadsafeTests.swift
index e79f7c5..220c19e 100644
--- a/Tests/SwiftMathTests/ConcurrencyThreadsafeTests.swift
+++ b/Tests/SwiftMathTests/ConcurrencyThreadsafeTests.swift
@@ -29,9 +29,9 @@ final class ConcurrencyThreadsafeTests: XCTestCase {
                 XCTAssertNotNil(result4)
             }
         }
-        executionGroup.notify(queue: .main) { [weak self] in
-            // print("All test cases completed: \(self?.testCount ?? 0)")
-        }
+//        executionGroup.notify(queue: .main) { [weak self] in
+//            // print("All test cases completed: \(self?.testCount ?? 0)")
+//        }
         executionGroup.wait()
     }
     func helperConcurrency(_ count: Int, in group: DispatchGroup, on queue: DispatchQueue, _ testClosure: @escaping () -> (Void)) {
diff --git a/Tests/SwiftMathTests/MTFontMathTableV2Tests.swift b/Tests/SwiftMathTests/MTFontMathTableV2Tests.swift
index a6dcbf4..512af91 100644
--- a/Tests/SwiftMathTests/MTFontMathTableV2Tests.swift
+++ b/Tests/SwiftMathTests/MTFontMathTableV2Tests.swift
@@ -47,14 +47,14 @@ final class MTFontMathTableV2Tests: XCTestCase {
     func helperConcurrentMTFontMathTableV2(_ count: Int, mtfont: MTFontV2, in group: DispatchGroup, on queue: DispatchQueue) {
         let workitem = DispatchWorkItem {
             let mTable = mtfont.mathTable
-            let values = [
-                mTable?.fractionNumeratorDisplayStyleShiftUp,
-                mTable?.fractionNumeratorShiftUp,
-                mTable?.fractionDenominatorDisplayStyleShiftDown,
-                mTable?.fractionDenominatorShiftDown,
-                mTable?.fractionNumeratorDisplayStyleGapMin,
-                mTable?.fractionNumeratorGapMin,
-            ].compactMap{$0}
+//            let values = [
+//                mTable?.fractionNumeratorDisplayStyleShiftUp,
+//                mTable?.fractionNumeratorShiftUp,
+//                mTable?.fractionDenominatorDisplayStyleShiftDown,
+//                mTable?.fractionDenominatorShiftDown,
+//                mTable?.fractionNumeratorDisplayStyleGapMin,
+//                mTable?.fractionNumeratorGapMin,
+//            ].compactMap{$0}
             // if count % 50 == 0 {
             //     print(values) // accessed these values on global thread.
             // }
@@ -64,14 +64,14 @@ final class MTFontMathTableV2Tests: XCTestCase {
             // print("\(Thread.isMainThread ? "main" : "global") completed .....")
             let mTable = mtfont.mathTable
             if count % 70 == 0 {
-                let values = [
-                    mTable?.fractionNumeratorDisplayStyleShiftUp,
-                    mTable?.fractionNumeratorShiftUp,
-                    mTable?.fractionDenominatorDisplayStyleShiftDown,
-                    mTable?.fractionDenominatorShiftDown,
-                    mTable?.fractionNumeratorDisplayStyleGapMin,
-                    mTable?.fractionNumeratorGapMin,
-                ].compactMap{$0}
+//                let values = [
+//                    mTable?.fractionNumeratorDisplayStyleShiftUp,
+//                    mTable?.fractionNumeratorShiftUp,
+//                    mTable?.fractionDenominatorDisplayStyleShiftDown,
+//                    mTable?.fractionDenominatorShiftDown,
+//                    mTable?.fractionNumeratorDisplayStyleGapMin,
+//                    mTable?.fractionNumeratorGapMin,
+//                ].compactMap{$0}
                 // if count % 50 == 0 {
                 //     print(values)
                 // }
diff --git a/Tests/SwiftMathTests/MathImageTests.swift b/Tests/SwiftMathTests/MathImageTests.swift
index d858923..7c081c6 100644
--- a/Tests/SwiftMathTests/MathImageTests.swift
+++ b/Tests/SwiftMathTests/MathImageTests.swift
@@ -40,7 +40,7 @@ final class MathImageTests: XCTestCase {
                 XCTAssertNotNil(result.image)
                 if result.error == nil, let image = result.image, let imageData = image.pngData() {
                     safeImage(fileName: "\(caseNumber)", pngData: imageData)
-                    let fileUrl = URL(fileURLWithPath: NSTemporaryDirectory())
+                    //let fileUrl = URL(fileURLWithPath: NSTemporaryDirectory())
                     print("completed image-\(caseNumber).png")
                 }
             default:
@@ -49,7 +49,7 @@ final class MathImageTests: XCTestCase {
                 XCTAssertNotNil(result.image)
                 if result.error == nil, let image = result.image, let imageData = image.pngData() {
                     safeImage(fileName: "\(caseNumber)", pngData: imageData)
-                    let fileUrl = URL(fileURLWithPath: NSTemporaryDirectory())
+                    //let fileUrl = URL(fileURLWithPath: NSTemporaryDirectory())
                     print("completed image-\(caseNumber).png")
                 }
             }
@@ -77,7 +77,7 @@ final class MathImageTests: XCTestCase {
         }
         executionGroup.notify(queue: .main) { [weak self] in
             let fileUrl = URL(fileURLWithPath: NSTemporaryDirectory())
-            print("\(self?.testCount)/\(self?.totalCases) completed, check \(fileUrl.path) ===")
+            print("\(self!.testCount)/\(self!.totalCases) completed, check \(fileUrl.path) ===")
             XCTAssertEqual(self?.testCount,self?.totalCases)
         }
         executionGroup.wait()