I personally think that will ruin the historical value of the place. What would Điện Biên Phủ be like if people use the place to chase each other in paintball games?

It's very nice up there in Điện Biên, if you go trekking up in the north western Vietnam take the route from Sapa - Lai Châu - Mường Lay - Điện Biên - Tây Trang - Luong Prabang (Laos), the Hoàng Liên Pass between Sapa & Lai Châu is the highest pass in Vietnam and the Pha Đin Pass between Phong Thổ & Chăn Nưa (from Lai Châu to Mường Lay) is the most adventurous pass in Vietnam. This north western area is still full of ethnic minorities and Kinh ethnic just recently moved in not long ago but it's changing fast especially in towns & cities where Kinh mainly settle. The road to A Pa Chải (the western tip of Vietnam where Vietnam borders Laos & China) is currently being built. This area used to be out of control of both China & Vietnam in the past and was an autonomous region for a short time (Vietnam only got it after the French moved in and signed border treaty with the Qing (Thanh) of China)

Papa Bear: Do you have a map to show us what you are talking about?

It's very nice up there in Điện Biên, if you go trekking up in the north western Vietnam take the route from Sapa - Lai Châu - Mường Lay - Điện Biên - Tây Trang - Luong Prabang (Laos), the Hoàng Liên Pass between Sapa & Lai Châu is the highest pass in Vietnam and the Pha Đin Pass between Sơn La - Tuần Giáo is the most adventurous pass in Vietnam. This north western area is still full of ethnic minorities and Kinh ethnic just recently moved in not long ago but it's changing fast especially in towns & cities where Kinh mainly settle. The road to A Pa Chải (the western tip of Vietnam where Vietnam borders Laos & China) is currently being built. This area used to be out of control of both China & Vietnam in the past and was an autonomous region for a short time (Vietnam only got it after the French moved in and signed border treaty with the Qing (Thanh) of China)