I think both have an impact. Openly urging them definitely is more effective. Making a personal urging has an effect as well.
The Chinese officials have strange ways of making friends. For example, if there is a Chinese government official who has more conversations about Falun Gong with foreigners, he will suffer suspicion. So I think openly urging them is better. It will make the international communities and other governments hear this and attach importance to these questions and stand up and voice this together. I think this is a very effective way, but under certain circumstances, if a personal exchange of opinions can be done, I think this could be effective as well.