Pay attention to the development of national defense science and technology-ordnance science and technology, international outlook, modern military, international aviation

Pay attention to military equipment-weapons knowledge, aviation knowledge, weapons, modern weapons and light weapons.

Military system concerned with the history of war-military history and military history.

Pay attention to naval equipment-ship knowledge

Pay attention to naval equipment and strategy-modern ships

Pay attention to the international shipbuilding trend-international ships

Paying attention to civilian military writers —— A study of the history of war and assault. I recommend Jane from England.

several causes

1. Older

2. The information source is authoritative.

3. A wide range of customers