整理：中东局势跟踪（7月21日）

Group 1: Gaza Conflict - The Israeli military has issued evacuation warnings and is set to launch a ground offensive in central Gaza, specifically in Deir al-Balah [1] - The Israeli military claims to have killed a Hamas weapons development official [1] - The ongoing Israel-Palestine conflict has resulted in 58,895 deaths in the Gaza Strip [1] - The number of Palestinians killed by Israeli shelling while waiting for aid trucks in northern Gaza has risen to 67 [1] - The Israeli Defense Ministry has signed a 500 million shekel (approximately 150 million USD) agreement to procure hundreds of light vehicles for the Israeli Defense Forces' ground troops [1] Group 2: Other Regional Developments - Iran has agreed to hold a new round of negotiations with three European countries on July 25 [2] - A joint naval exercise between Iran and Russia is scheduled to take place in the Caspian Sea on the 21st [2] - Putin met with a senior advisor to Iran's Supreme Leader to discuss the Iran nuclear issue [2] - The Israeli Prime Minister's office announced that Netanyahu has been diagnosed with intestinal inflammation and will manage affairs from home for the next three days [2] - According to AXIOS, dissatisfaction is rising within Trump's team following Israeli airstrikes in Syria, with claims that Netanyahu is acting irrationally [2]