Is it safe to travel overseas during the process of removing the 2 years conditional residence ?

To answer your questions: 1. the risks depend on your particular circumstances. 2. about 14 months. 3. there isn't a requirement to be in the US a certain number of days in order to remove the condition, but there is a requirement that any permanent resident show that they are permanently residing in the US. 4. No that person may not be permitted to re-enter the US, or when you re-enter you may be placed into removal (deportation) proceedings since CBP may determine that you are no longer a permanent resident. Additionally, if you are physically separated from your spouse for a year you may have difficulty demonstrating that you are still in a good faith relationship with your spouse.

Q: Is it safe to travel overseas during the process of removing the two years conditional residency ? A: In most cases, yes. Especially if you're traveling with your spouse. Q: How long does it take to get the new 10 years greencard renew ? A: it depends on the quality of your 751 paperwork. Six months to 3 years are possible. Q: How many physical days require to stay in the US during the 2 years conditional residence in order to get remove the conditions to apply for the 10 years green card ? A: Never leave the US for more than 180 days on any one trip. Q: Will that person need to have a police certificate from his own country if he spend one year out of 2 years conditional residence times in his own country ? A: Need a certificate? No. Will immigration consider the greencard abandoned and VOID? Yes, probably.

Typically yes, but don't stay outside too long

As long as you are still married and living with your spouse, travel is fine. If you are divorced, your CPR has been terminated and you should not travel until your permanent permanent residence is granted.