Hooker does mention that the Chinese had problems with their WP-7 military engine turbine blades. The fir-tree root was prone to cracking that led to the blade(s) departing the engine. They also had a problem with combustion chamber cracking due to the various thicknesses of metal used resulting in different rates of cooling when the power was reduced. The cracks would finally liberate chunks of material that would pass through the turbine.
RR sent them detailed drawings of the Spey turbine fir-tree root on the basis that they had lots of Speys in their Tridents so they already had the info if they cared to look. It would appear however that civilian aviation & military aviation were kept in separate 'boxes' and never were the twain to meet.
With regard to the combustion chamber problem, Hooker explained what the cause of the problem was and how it could be solved by the use of thicker material and keyhole slots cut in to the material. Once again he says they already had the answer if they had only bothered to look at the Russian copies of the the Nenes they had