Merge branch 'yangwu1.3' into 1.3nsq

pansen

2019-04-03 17ae0cd78c16f55d38dc3f9ad6b27688f445aee3

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aeroplane
bicycle
bird
boat
bottle
bus
car
cat
chair
cow
diningtable
dog
horse
motorbike
person
pottedplant
sheep
sofa
train
tvmonitor