what if lanka allow to place chinks subs in their ports ??
or what if lankans allow to have a airforce base to chinks ??
now, ig you might have got the real problem here
Any such scenario where sri lanka becomes Chinese colony/ally will turn itself into a play thing between india china and US.
Remember that Diego Garcia is less than 2000 km from sri lanka.
Sri lanka's interests are served by playing india usa and china off each other.
Our and US interests are served by making sure sri lanka stays neutral.
Because we don't need sri lanka to project power into IOR as we have our peninsula, island territories, bases on less populated and farther off island nations in IOR
US is also in a similar position.
China on the other hand absolutely needs sri lanka to give up some sovereignty and bases etc.
We can and should use this and not let ourselves be guided by hubris.
Political Integration of Sri lanka doesn't offer much.
No gain in resources that we cant trade either.
We'll just import a new headache with secessionist tendencies.
Our focus should be economic and cultural integration.
We are much better situated than china in this regard.
And with time ie decades sri lanka and indian relationship will evolve where going against each other's interests will be costly for both and opposed by domestic population.
That should be the goal.