PLA Navy holds drill on South China Sea(1/12)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)

A PLA Navy fleet recently held a military drill on the South China Sea to improve its contingency response to complicated scenarios including a coordinated sea and air fight against submarine intrusion. (Photo/81.cn)