Tā zhīdào fēngxiǎn hěn dà, jíshǐ rúcǐ, tā háishì juédìng qiánxíng.
He knew the risks were great; even so, he decided to press on.
Tips
usage
即使如此 combines 即使 (even if) + 如此 (like this/such). It is used to acknowledge a concession while asserting a contrary conclusion. Similar to 尽管如此, but 即使如此 is more hypothetical.