Peter Beales, A Passion for Roses. Published by Mitchell Beazley. 2004 edition.

The Chinas

p.72
One of the first Chinas to arrive in Europe came in 1789 in the form of 'Old Blush', a soft pink variety. A few years later a red form was introduced, this one coming via India; it was, at first, called 'Bengal Rose', but later became known as 'Slater's Crimson' or R. chinensis 'Semperflorens'. Two more came from China during the next few decades; 'Odorata', known as 'Hume's Blush' and 'Parks Yellow' or R odorata 'Ochroleuca'. These four became known as the "four stud Chinas". All were related by natural fertilization to R. gigantea, and this mix of genes would later lead on to the Portlands, Bourbons, the Tea roses and so on.
Over the years I have acquired a stock of all four of the original Chinas and I am satisfied that they are authentic but, it must be said, their legitimacy has been challenged by others from time to time. I try to keep an open mind on matters of authenticity but the issue usually boils down to what else could they be, if they are not the real thing; I am never able to answer that question. Sometimes, I must admit, I find these challenges of authenticity, however well meant, get in the way of more pleasurable side of rose appreciation.

p.77
Now to return to 'Odorata' and 'Parks Yellow', two of the original stud Chinas. These two roses are sometimes listed as Tea roses but I feel they are better placed here as Chinas. 'Odorata' has double, blush white, fragrant flowers and is quite vigorous, up to 1.8m (6ft). Growing about the same height, 'Park's Yellow' has numerous flowers in its first flush and a spasmodic crop later; the blooms are fragrant, semi-double, and pale sulphur-yellow with orange-tinted edges, the orange deepening as the flower mature. Both this rose and 'Odorata' need to be grown in sheltered positions in cooler climates since they are susceptible to damage by severe frost.