"I also recognize the right of a sovereign nation to carry out justice according to its legal system."

Like Hitler's Third Reich? Pol Pot perhaps? What about Saddam's legal system? All sovereign countries.

"China's justice is harsh."

Too true; they also execute people for tax evasion and any number of other crimes some of which expose China's deep hypocrisy: from wikipedia.

"then his nearest & dearest should have prevented him from undertaking such a potentially hazardous,for one whose Mentis is not wholly Compos,expedition."

Perhaps if you have no direct experience of mental illness or people suffering from it you should think harder before making fatuous statements like this.