Year	Date	Events
1920		Beginning of missionary work in Tai O (Lantao Island).
	15 September	"The Rock", a Catholic English language monthly, launched.
		Arrival of Maryknoll Fathers who established their Procure and took charge of the St. Louis Industrial School (former West Point Reformatory and Orphanage) from 1921 to 1926; and pastoral work since 1952.
1921		Maryknoll Sisters arrived for educational and pastoral work (MM Convent School in 1925).
1922		Precious Blood Sisters started as independent Congregation from the Canossians (juridically established as such on 19 July 1929); in Sham Shui Po since 1929; the Precious Blood Hospital opened in 1937.
1923	2 February	Little Sisters of the Poor arrived to take care of the Home for the Aged in Kowloon (and then in Aberdeen in 1962).
1924	20 February	Death of Bishop Pozzoni; Fr. J.M. Spada elected Vicar Capitular.
1925	25 January	Blessing of St. Margaret Mary's Church, Happy Valley (erected as a parish on 25 January 1949).
1926	8 March	Fr. Henry Valtorta appointed as 4th Vicar Apostolic (consecrated bishop on 13 June).
	1 May	New Territories divided into 3 eccl. districts: East (Sai Kung), West (Taipo) and Islands.
	3 December	Arrival of the Jesuit Fathers, who opened Ricci Hall Hostel (1929), took charge of the South China Regional Seminary (1931) and of Wah Yan College (1932).
		Canadian Sisters of Our Lady of the Angels arrived for educational work (St. Clare's School: 1927).
1927	1 October	Salesian Fathers arrived: took charge of the St. Louis Industrial School.
1928	19 March	Opening of St. Joseph's Hospital in Waichou.
	4 August	"Kung Kau Po", a Catholic Chinese language weekly, founded by Fr. A. Granelli.
		Canadian Sisters of the Immaculate Conception arrived for educational work (Tak Sun School: 1928).
1929		Precious Blood Church, Sham Shui Po, opened (divided from Rosary and St. Teresa's Churches in 1933, rebuilt in 1937, erected as a parish on 25 January l949).