can you please elaborate this point??how S20 is going to be compatible with western sensors and equipments??plus,how you can be so sure that France will allow their Mesma AIP to install into a chinese origin sub??Mesma is compatible with Augusta 90B and Scorpene and is quite costly.plus,the sub going to need a new hull section of 27 feet,which means either you need to add it during construction or you've to cut your submarines to integrate it later.its way better if they choose Chinese AIP instead,which is based on Striling AIP.