Secondly it was not until a steel bow was used in Europe with 1000lb draw strengths that the crossbow came under fire as an immoral weapon because it allowed a peasant to shoot down a knight.
Bad scholarship on your part again. 1000lbs require a huge crossbow that has to be cranked. Not something your average peasant could use. If the Pope banned crossbows that peasants could use, you're talking of something smaller, cheaper and much easier to handle. Something like this.
100 kg draw strength on the recreation.
Average Chinese infantry crossbow is 6 Dan. 10 Dan crossbrows are 268kg in strength.
'Records mentioning 8 dan crossbows were also discovered in the Han tomb at Juyan. In addition, it is recorded in Han bamboo that there were crossbows of 8 different tensile strengths, namely of 1, 3, 4, 5, 6, 7, 8 and 10 dan. The most widely used is a crossbow of 6 dan which has a shooting range of about 260m, about a quarter of a kilometre.''
He also has a reference to records found on Han era slips at Pochenji recording repairs to weapons at a watch/beacon station. They include a crossbow of 5-pical (250kg) and 6-pical (300kg). Both of these in excess of infantry crossbows listed so without any other explanation I can only assume these are static crossbows at the watchtowers and perhaps one reference to the elusive Han-era arcuballistas.
Yang Hong in referring to the Wei & Jin and a specific mechanism says 'They are similar to those of the Han dynasty in both form and in structure. The strength of the crossbow is given as 10 dan...(268.3 kilos).
The figures seem to become a bit wild beyond here with reference to General Ma Ling recruiting new soldiers and only admitting those that 'could bend a crossbow of 36-jun with his waist...One jun is 15 kilograms and the figure above leads to the conclusion that the crossbow was bent using both arms and the waist, having a strength of 500kgs''. (?!)
He mentions winch loaded crossbows specifically such as Shen Nu/magic crossbow and it is said to be 10,000 jun. He acknowledges this must be an exaggeration....or else perhaps something is wrong with both these accounts. Precisely how a crossbow is 'waist bent' (with a belt hook?) and how many people are humanly capable to work with such weights (500kg) leads me to conclude that despite the reasonable figures up until this point, and the clear referencing of all of his sources, that both figures can be discounted in this case. This is the only part of Yang Hongs book which didn't sit right with me, and the rest of it is quite excellent.
He does however have information on very large crossbow mechanisms which are certainly proof of very heavy ballista-like devices at this time (between Han & Tang). Again the Han must have been capable of producing such devices....
{edit; if the soldiers could lift wieghts like Olympic athletes such 500kg figures might just be in the realm of international lifters...the heavier devices are certainly winch loaded when getting into fantastic realms. Song era crossbows for siege were true war machine crewed by a team of operators for example.}