I don't know why people are so interested in net salary. Its all different in different countries and how efficient you are with your tax.
example; earn over £100,000 in the UK and you loose you tax free allowance and you pay 50%, however increase your pension contributions and tax free benefits and your 'net' increases by 50% technically as a total package.
Look at it this way.
(All numbers approx.)
Ryanair Captain average gross basic = £55,000 (depends on country and exchange rate)
easyJet Captain average gross basic = £95,000 (depends on country and exchange rate)
Obviously Ryanair hourly sector pay is higher than easyJet's physical sector pay, but then you can only do 900 per year.
Ryanair sector = £38 per hour -> 900x£38 = £34,200
easyJet sector = £31 per sector - 1h flight = 0.8 sector -> 900x(£31x0.8) = £22,000
So clearly you can see that even just looking at basics Ryanair pay is low.
Realistically, easyJet is one of the better paying companies in Europe. China money on reverse rotations is just not realistic. It is not a true representation of what you can expect to earn. On top of that "part-time" is either 1month/1month long haul or 2weeks/2weeks on short haul flying IN China.
Would I go and do it - nope.