Absolutely not, and especially so if those neighbors were aligning with the USA. Do you think China would be excited about Taiwan or Mongolia forming a military alliance with the USA? Even if it is defensive?
Read point 2. It clearly condemns defensive Alliances.
“The security of a region should not be achieved by strengthening or expanding military blocs.“
...
“All parties should oppose the pursuit of one's own security at the cost of others' security, prevent bloc confrontation, and work together for peace and stability on the Eurasian Continent.“
I can't think of another way to read this