meaning for 循序渐进 xúnxùjiànjìn:

  • - in sequence, step by step (idiom)
  • - to make steady progress incrementally

suǒyǐ所以
gǔchéng古城
de
lǚyóu旅游
kāifā开发
yídìng一定
yào
liànglìérxíng量力而行
xúnxùjiànjìn循序渐进

Therefore, the city's tourism development must act within our capability and gradual manner.