In my last 2 journals, I wrote separately wroteabout two important political innovations implemented/carried out in Japan and China at nearly at the same time in the 1860s.

The reform in Japan succeeded but failed in China.

succeed=present tense, succeeded=past tense

I read some books about the restorations and finally got to know two main points were the most necessary.about the two most important points (objectives/goals?)

1: To build a fair and [scientific (?)] constitution and lawegal system.

2: To respect personal propertiesy and implement a free market economy.

In my last 2 journal entries, I (separately) wrote about two important political innovations carried out in Japan and China nearly at the same time in, starting in the 1860s.

A journal is a collection of entries or posts.

“Separately” is unnecessary.

The reform succeeded in Japan succeed but failed in China.

alternative: The reform in Japan succeeded but that in China failed.

I read some books about the restorationforms and finally gotcame to know that two main points were the most necessarycrucial / were the most important.

The reforms in Japan are often called the “Meiji Restoration,” but I don’t think the Chinese reforms are usually labeled “restorations.”

2: respect personal propertiesy and implement a free market economy.

“Property” is uncountable in this context.
"Private property" is more common than "personal property" in this context.

I my last 2 journals, I wrote separately wroteabout two important political innovations carried outdevelopments that happened in Japan and China nearly at the same time in the 1860s.

The reform in Japan succeed, but failed in China.

I read some books about the restorations and finally got to knowfound out that two main points were the most necessaryimportant.

1: build a fair and scientific constitution and lawegal system.

2: respect personal propertiesy and implement a free market economy.