From 1936 to 1945, Cheng served as a judge of the Permanent Court of International Justice in The Hague, Netherlands, the work of which was cut short by the outbreak of World War II.
In 1933, the Permanent Court of International Justice attested Denmark's authority in Greenland, with cultural, political and structural impacts for the Inuit.
Permanent Court of International Justice, the international court of the League of Nations
He was a close associate of the republic's founding father, Sun Yat-sen, an active member of the Kuomintang ("Chinese Nationalist Party"), and a judge on the Permanent Court of International Justice in the Hague.
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In 1931 he was elected to serve as Permanent Judge on the Permanent Court of International Justice at The Hague, where he served until 1942 when he resigned due to theonset of World War II.
In November 1923 France moved its customs office to Gex, and the matter was brought before the Permanent Court of International Justice (predecessor of the International Court of Justice), which decided in favour of Switzerland.
From February 1952 until his death, he was a judge of the Permanent Court of International Justice, The Hague.
After leaving the presidency, Epitácio Pessoa was elected to be a Justice of the Permanent Court of International Justice at The Hague, and stayed on the bench until November 1930.
In 1922 the Permanent Court of International Justice of the League of Nations was added to the occupants.