Thank you all for your replies. I have been looking into KE or MU before and I don't think any of them can earn miles or status so easily. I used to use Oneworld (Finnair Plus) and Star Alliance (SAS EuroBonus) over past 10 years and none was possible to earn even silver status, but with CZ just in one year it was possible. Also I have been very happy with the services provided by AF/KL, and to Wuhan CZ/MU serves most of the flghts, so Skyteam is the one I should stick to. I know Flying Blue is already quite generous in segment qualification, but the number of flights I can take a year will be hardly enough to qualify Elite Plus. Perhaps I should either stick to CZ to manage with 40% earning to barely keep Elite, or try with DL Skymiles for 100% miles earning to get Elite Plus. Somehow I feel that there should be a better solution, but just need to find out, and that's why I post here wishing to find out how.