Merge pull request !4121 from Simson/enhancement-API

Merge pull request !4176 from chenjianping/lite_dev2

Merge pull request !4129 from 陶云浩/elu

Merge pull request !4054 from Chong/wd

Merge pull request !4068 from yangzhenzhang/add-concat-op

Merge pull request !4084 from peixu_ren/custom_bijector

Merge pull request !4178 from yangruoqi713/lite

Merge pull request !4169 from wandongdong/master

Merge pull request !3982 from peixu_ren/custom_pp_ops

Merge pull request !4171 from ZPaC/master-supports-lazy-adam-in-ps

Merge pull request !4136 from wangchangkai/master

Merge pull request !4175 from yonibaehr/export

Merge pull request !4049 from liubuyu/master

Merge pull request !4167 from andy_wangrui/master

Merge pull request !4124 from fangzehua/biasadd

Merge pull request !4137 from andy_wangrui/master

Merge pull request !4151 from ZPaC/master-fix-ps-training-precision-error

Merge pull request !4163 from hangq/master

Merge pull request !4118 from xutianchun/quant_0807

Merge pull request !4096 from lianliguang/unify-primitive-and-generate-graph

Merge pull request !4152 from hangq/master

Merge pull request !4157 from yangruoqi713/lite

Merge pull request !3909 from yangjie159/fix-get-subgraph-input

Merge pull request !4105 from liangzelang/change-mem-pools-management

Merge pull request !4150 from JoyLvliang/enable-the-identity-op-can-be-eliminated-in-pynative-mode

Merge pull request !4153 from chenjianping/lite_dev2

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Merge pull request !4156 from sunsuodong/fix_populate_parameter