This sentence is written by Chinese. 這是中文字。This sentence is written by Chinese.\
hspace*{2em}fbox{begin{minipage}[t][][t]{textwidth-4em}
    $begin{alignedat}[t]{3}
    &(mathcal{MS}1)~~text{scshape Positive Definite}&&quad&&forall x,yin X,~d(x,y)geq 0wedge(d(x,y)=0Leftrightarrow x=y)\
    &(mathcal{MS}2)~~text{scshape Symmetric}&& &&forall x,yin X,~d(x,y)=d(y,x)\
    &(mathcal{MS}3)~~text{scshape Triangle Inequality}&& &&forall x,y,zin X,~d(x,z)leq d(x,y)+d(y,z)
    end{alignedat}$
    end{minipage}}\
This sentence is written by Chinese. 這是中文字。This sentence is written by Chinese. 這是中文字。This sentence is written by Chinese. 這是中文字。