China selling two Type 035 Ming-class submarines to Bangladesh

Zachary Keck of The Diplomat, December 22, 2013, writes that China is selling Bangladesh two obsolescent Type 035G Ming-class submarines for $203.3 million for delivery by 2019. See The Diplomat article http://thediplomat.com/2013/12/china-to-sell-bangladesh-2-submarines/ based on a Bangladeshi New Age article http://newagebd.com/detail.php?date=2013-12-20&nid=77363#.Urjor2fxvX5

For details on the Ming-class see http://www.globalsecurity.org/military/world/china/ming.htm and its specifications http://www.globalsecurity.org/military/world/china/ming-specs.htm

The Ming-class submarines (Type 035) are diesel-electric powered submarines based on the Romeo-class submarines that the Soviet Union built in the 1950s. The Russian Romeos in turn utilised much of the technology in the German World War Two Type XXI U-boats.

Comment

While officers and crew usually total 55 for each submarine the New Age report, that only seventeen Bangladeshi sailors are being trained to operate the submarines, is puzzling. Does that mean there will be around 46 Chinese officers and crew as "advisers" on each submarine? Will they therefore be de facto Chinese submarines under Bangladeshi false flags?
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Pete