     let label = T()
     label.text = "AL"
     label.translatesAutoresizingMaskIntoConstraints = false
-    label.font = font ?? UIFont(name: "PingFangSC-Semibold", size: DefaultTitleFontSize)
+    label.font = font ?? /*UIFont(name: "PingFangSC-Semibold", size: DefaultTitleFontSize)*/UIFont.boldSystemFont(ofSize: DefaultTitleFontSize)
     label.textColor = .clear
     label.backgroundColor = .clear
     return label

    }
    
    private var _selectionTitleColors: [Bool: UIColor] = [true: UIColor(hex: "4A4A4A"), false: UIColor(hex: "CCCCCC")]
    private var _selectionTitleFonts: [Bool: UIFont] = [true: UIFont(name: "PingFangSC-Semibold", size: DefaultTitleFontSize)!, false: UIFont(name: "PingFangSC-Semibold", size: DefaultTitleUnselectedFontSize)!]
    
    public func setTitleColor(_ titleColor: UIColor, whenSelected selected: Bool) {
        _selectionTitleColors[selected] = titleColor

        let button = _TabNavigationItemButton(type: .system)
        button.translatesAutoresizingMaskIntoConstraints = false
        button.backgroundColor = UIColor.clear
        button.titleLabel?.font = /*UIFont(name: "PingFangSC-Semibold", size: DefaultTabNavigationItemFontSize)*/UIFont.boldSystemFont(ofSize: DefaultTabNavigationItemFontSize)
        return button
    }()
    
